Circuit breaker with arc extinguishing mechanism

Abstract

The utility model relates to the technical field of electrical equipment, and discloses a circuit breaker with an arc extinguishing mechanism, the circuit breaker comprises a circuit breaker body and an arc extinguishing cover, the interior of the circuit breaker body is provided with a cavity, the interior of the arc extinguishing cover is provided with a plurality of arc extinguishing plates through a plurality of through holes in a nested manner, and one side of the bottom end of each arc extinguishing plate is fixedly provided with a barrier strip. Magnets are embedded in the multiple barrier strips, and two limiting holes are formed in the two sides of each barrier strip in a penetrating mode. According to the circuit breaker with the arc extinguishing mechanism, by changing the connection mode of the arc extinguishing plate and the arc extinguishing cover, fixed connection is changed into detachable connection, when the arc extinguishing structure extinguishes arcs, generally, the bottommost end bears more arcs which are gradually reduced upwards in sequence, and when the arc extinguishing plate at the bottom end reaches the service life, the upper end of the arc extinguishing plate bears smaller arc pressure, so that the arc extinguishing plate is prevented from being damaged. And the service life is long, so that the independent arc extinguishing plate can be replaced by adopting detachable connection, the whole arc extinguishing plate does not need to be replaced, and the resource waste can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical equipment, and in particular relates to a circuit breaker with an arc extinguishing mechanism. Background Art

[0002] A mechanical switching device that can close, carry, and disconnect currents under normal circuit conditions; carry a specified overcurrent within a specified time, and can close and disconnect currents under abnormal circuit conditions (such as various short-circuit conditions).

[0003] The existing patent (publication number: CN220233072U) discloses an arc extinguishing hood of a circuit breaker with an insulation protection mechanism, including two side plates and a plurality of arc extinguishing grids fixedly installed between the two side plates and arranged at equal intervals, the outer sides of the side plates are fixedly provided with reinforcing side plates, the tops of the side plates are provided with a first insulating protection body by snap-fitting, and the bottoms of the side plates are provided with a second insulating protection body by snap-fitting. The first insulating protection body and the second insulating protection body can play the role of arc insulation and arc isolation, thereby avoiding the hot air flow generated by the arc to flow back through the rear wall of the arc extinguishing hood, thereby avoiding the circuit breaker from breaking down, avoiding the breakdown from damaging the circuit breaker and the equipment, avoiding harm to the human body, and at the same time, avoiding the arc from being free to affect the inside of the circuit breaker. The device improves the arc isolation and arc extinguishing effects of the arc extinguishing hood, thereby improving the service life of the circuit breaker.

[0004] The above-mentioned comparative document points out that by providing a first insulating protective body and a second insulating protective body, the arc can be insulated and isolated, so as to avoid the hot air flow generated by the arc from flowing back through the rear wall of the arc extinguishing hood, thereby avoiding the breakdown of the circuit breaker, avoiding damage to the circuit breaker and equipment caused by the breakdown, avoiding harm to the human body, and at the same time, avoiding the influence of arc freedom on the inside of the circuit breaker. The present device improves the arc isolation and arc extinguishing effects of the arc extinguishing hood, thereby improving the service life of the circuit breaker. However, the device fixes the arc extinguishing plate and the arc extinguishing hood, and all of them need to be replaced when replaced. However, when the arc extinguishing structure is extinguishing, the lowest end generally bears more arc, and the arc decreases upwards. When replacing, all of them need to be replaced, which easily causes a waste of resources. Therefore, a circuit breaker with an arc extinguishing mechanism is proposed to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the prior art, the present application provides a circuit breaker with an arc extinguishing mechanism, which has the advantages of easy installation and easy replacement of arc extinguishing plates, etc., and solves the problem pointed out in the above-mentioned comparative documents that the device fixedly connects the arc extinguishing plate and the arc extinguishing cover, and all of them need to be replaced when replaced. However, when the arc extinguishing structure is extinguishing the arc, the lowest end generally bears more arc, and the arc decreases gradually upwards. When replacing, all of them need to be replaced, which easily leads to a waste of resources.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: a circuit breaker with an arc extinguishing mechanism, comprising a circuit breaker body and an arc extinguishing cover, a cavity is provided inside the circuit breaker body, two positioning grooves are provided inside the cavity, positioning blocks are fixedly provided on both sides of the bottom end of the arc extinguishing cover, the arc extinguishing cover is nested in the cavity through the two positioning blocks and the positioning grooves, a plurality of arc extinguishing plates are nested in the arc extinguishing cover through a plurality of through holes, a plurality of arc extinguishing plates are fixedly designed with a baffle on one side of the bottom end, a plurality of baffles are fixedly provided with a card block on one side, a plurality of baffles are nested with magnets inside the baffles, and two limiting holes are provided on both sides of the plurality of baffles.

[0007] Through the above scheme, the device changes the connection method between the arc extinguishing plate and the arc extinguishing cover from a fixed connection to a detachable connection. When the arc extinguishing structure is extinguishing an arc, the bottom end is generally the one that bears more arc, and the arc pressure decreases upwards. When the arc extinguishing plate at the bottom reaches the end of its service life, the upper end still has a service life because it is subject to less arc pressure. Therefore, a detachable connection can be used to replace a single arc extinguishing plate without the need for overall replacement, which can reduce waste of resources.

[0008] Furthermore, a cover plate is fixedly provided on the upper end of the circuit breaker body by a plurality of bolts.

[0009] According to the above solution, the internal structure of the circuit breaker body is hidden by providing a cover plate.

[0010] Furthermore, a plurality of card slots are provided on one side of the arc extinguishing cover, and the plurality of card slots are nested with a plurality of card blocks.

[0011] Through the above solution, the clamping block cooperates with the clamping slot to further limit the position of the arc extinguishing plate.

[0012] Furthermore, a plurality of heat dissipation holes are formed through one side of the circuit breaker body, and the plurality of heat dissipation holes all correspond to the cavity.

[0013] According to the above scheme, heat is generated when an arc is generated, and the arc extinguishing structure can dissipate heat by providing heat dissipation holes.

[0014] Furthermore, four limiting strips are fixedly provided on one side of the bottom end of the cover plate, the four limiting strips correspond to the four limiting holes and all the limiting strips pass through the limiting holes.

[0015] Through the above solution, the arc extinguishing structure is fixed by providing the limiting strips and the limiting holes.

[0016] Furthermore, the arc extinguishing cover is made of metal material.

[0017] Through the above scheme, the magnet attracts the arc extinguishing cover to fix the pre-installed arc extinguishing plate.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0019] The device changes the connection mode between the arc extinguishing plate and the arc extinguishing cover from a fixed connection to a detachable connection. When the arc extinguishing structure is extinguishing an arc, the bottom end is generally the one that bears more arc pressure, and the pressure decreases upwards. When the arc extinguishing plate at the bottom reaches the end of its service life, the upper end still has a service life because it is subject to less arc pressure. Therefore, a detachable connection can be used to replace a single arc extinguishing plate without replacing the entire arc, thereby reducing resource waste. At the same time, the arc extinguishing cover is nested and installed in the cavity, and then the limit strip is passed through the limit hole through the fixed cover plate to fix it for a second time. In this way, the arc extinguishing structure can be easily disassembled and assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a circuit breaker with an arc extinguishing mechanism according to the utility model;

[0021] Figure 2 This is a schematic diagram of an arc extinguishing structure of a circuit breaker with an arc extinguishing mechanism according to the utility model;

[0022] Figure 3 This is a schematic diagram of the cavity structure of a circuit breaker with an arc extinguishing mechanism according to the utility model;

[0023] Figure 4 This is a schematic diagram of the disassembled structure of an arc extinguishing device of a circuit breaker with an arc extinguishing mechanism according to the utility model;

[0024] Figure 5 This is a schematic diagram of the arc extinguishing plate structure of a circuit breaker with an arc extinguishing mechanism according to the utility model;

[0025] Figure 6 The utility model is a schematic diagram of a cover plate structure of a circuit breaker with an arc extinguishing mechanism.

[0026] Explanation of the markings in the figure: 1. Circuit breaker body; 2. Cover plate; 3. Heat dissipation hole; 4. Cavity; 5. Positioning groove; 6. Arc extinguishing cover; 7. Positioning block; 8. Slot; 9. Arc extinguishing plate; 10 Baffle bar; 11. Block; 12. Magnet; 13. Limit hole; 14. Limit bar. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Embodiment 1

[0029] See also Figure 1 , Figure 2 and Figure 3 In this embodiment, a circuit breaker with an arc extinguishing mechanism includes a circuit breaker body 1 and an arc extinguishing cover 6. A cavity 4 is provided inside the circuit breaker body 1, and two positioning grooves 5 are provided inside the cavity 4.

[0030] Embodiment 2

[0031] See also Figure 3 , Figure 4 and Figure 5 Positioning blocks 7 are fixedly provided on both sides of the bottom end of the arc-extinguishing cover 6. The arc-extinguishing cover 6 is nested in the cavity 4 through two positioning blocks 7 and the positioning groove 5. A plurality of arc-extinguishing plates 9 are nested in the arc-extinguishing cover 6 through a plurality of through holes. A baffle 10 is fixedly designed on one side of the bottom end of the plurality of arc-extinguishing plates 9. A clamping block 11 is fixedly provided on one side of the plurality of baffles 10. Magnets 12 are nested inside the plurality of baffles 10. Two limiting holes 13 are penetrated on both sides of the plurality of baffles 10.

[0032] Embodiment 3

[0033] See also Figure 1 , Figure 3 and Figure 4 A cover plate 2 is fixed on the upper end of the circuit breaker body 1 by multiple bolts, a plurality of card slots 8 are opened on one side of the arc extinguishing cover 6, and the plurality of card slots 8 are nested with a plurality of card blocks 11. A plurality of heat dissipation holes 3 are opened through one side of the circuit breaker body 1, and the plurality of heat dissipation holes 3 correspond to the cavity 4.

[0034] Embodiment 4

[0035] In addition to all the technical features of Embodiment 1, Embodiment 2 and Embodiment 3, this embodiment also includes:

[0036] See also Figure 4 , Figure 5 and Figure 6 Four limiting strips 14 are fixedly arranged on one side of the bottom end of the cover plate 2. The four limiting strips 14 correspond to the four limiting holes 13 and all the limiting strips 14 pass through the limiting holes 13. The arc extinguishing cover 6 is made of metal material.

[0037] In this embodiment, the device changes the connection method between the arc extinguishing plate 9 and the arc extinguishing cover 6 from a fixed connection to a detachable connection. When the arc extinguishing structure is extinguishing an arc, the bottom end is generally subjected to more arc pressure, and the pressure decreases upward. When the arc extinguishing plate 9 at the bottom reaches the end of its service life, the upper end is subjected to less arc pressure and still has a service life. Therefore, a detachable connection can be used to replace a single arc extinguishing plate 9 without replacing the entire arc, thereby reducing resource waste. At the same time, the arc extinguishing cover 6 is nested and installed in the cavity 4 and then fixed for the second time by passing the limit bar 14 through the limit hole 13 when the cover plate 2 is fixed. In this way, the arc extinguishing structure can be easily disassembled and assembled.

[0038] The working principle of the above embodiment is:

[0039] When the device is in use, the arc extinguishing plates 9 are inserted into the arc extinguishing cover 6 in sequence, the clamping block 11 is nested with the clamping slot 8, and the magnet 12 is in contact with the arc extinguishing cover 6 to fix the inserted arc extinguishing plates 9, the assembled arc extinguishing structure is inserted into the cavity 4, the four limit bars 14 are respectively aligned with the four limit holes 13, and after the limit bars 14 are inserted into the limit holes 13, the cover plate 2 and the circuit breaker body 1 are fastened with bolts. When the arc extinguishing structure needs to be inspected or disassembled and replaced, it is only necessary to open the cover plate 2, take out the arc extinguishing structure or the arc extinguishing plate 9 with greater damage in the arc extinguishing structure for replacement.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A circuit breaker with an arc extinguishing mechanism, comprising a circuit breaker body (1) and an arc extinguishing cover (6), characterized in that: A cavity (4) is provided inside the circuit breaker body (1), two positioning grooves (5) are provided inside the cavity (4), positioning blocks (7) are fixedly provided on both sides of the bottom end of the arc extinguishing cover (6), the arc extinguishing cover (6) is nested with the positioning grooves (5) through the two positioning blocks (7) inside the cavity (4), a plurality of arc extinguishing plates (9) are nested inside the arc extinguishing cover (6) through a plurality of through holes, a plurality of arc extinguishing plates (9) are fixedly provided with a blocking bar (10) on one side of the bottom end of each of the arc extinguishing plates (9), a clamping block (11) is fixedly provided on one side of each of the blocking bars (10), a magnet (12) is nested inside each of the blocking bars (10), and two limiting holes (13) are provided through both sides of each of the blocking bars (10).

2. A circuit breaker with an arc extinguishing mechanism according to claim 1, characterized in that: A cover plate (2) is fixedly provided on the upper end of the circuit breaker body (1) via a plurality of bolts.

3. A circuit breaker with an arc extinguishing mechanism according to claim 1, characterized in that: A plurality of card slots (8) are provided on one side of the arc extinguishing cover (6), and the plurality of card slots (8) are nested with a plurality of card blocks (11).

4. A circuit breaker with an arc extinguishing mechanism according to claim 1, characterized in that: A plurality of heat dissipation holes (3) are provided through one side of the circuit breaker body (1), and the plurality of heat dissipation holes (3) all correspond to the cavity (4).

5. A circuit breaker with an arc extinguishing mechanism according to claim 2, characterized in that: Four limiting strips (14) are fixedly arranged on one side of the bottom end of the cover plate (2), the four limiting strips (14) correspond to the four limiting holes (13), and the limiting strips (14) all pass through the limiting holes (13).

6. A circuit breaker with an arc extinguishing mechanism according to claim 1, characterized in that: The arc extinguishing hood (6) is made of metal material.

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