High-efficiency arc extinguishing circuit breaker with good safety

Abstract

The utility model provides a high-efficiency arc extinguishing circuit breaker with good safety. The high-efficiency arc extinguishing circuit breaker comprises a circuit breaker body, a swingable action piece is arranged in the circuit breaker body, the action piece is used for controlling switching between an on state and an off state of the circuit breaker body, and a locking assembly acting on the action piece is further arranged in the circuit breaker; the locking assembly comprises a pressing block arranged on the end face of the circuit breaker body in a pressing mode, one side of the pressing block is connected with a first rack, a transmission gear is further rotatably arranged in the circuit breaker body, the transmission gear is meshed with the first rack, a locking shaft is further slidably arranged in the circuit breaker body, the locking shaft is perpendicular to the first rack, and the first rack is meshed with the transmission gear. One end of the locking shaft is connected with a second rack, the second rack is also meshed with the transmission gear, and the locking shaft is provided with a protruding part used for limiting the action piece to be located at the lowest point of the stroke. According to the utility model, the locking assembly is arranged in the circuit breaker, so that the misoperation of the circuit breaker caused by accidentally touching the action piece is avoided.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a high-efficiency arc-extinguishing circuit breaker with good safety. Background Technology

[0002] In low-voltage power distribution systems, circuit breakers are crucial protective and control electrical appliances. One common type is the plug-in circuit breaker, which is widely used in various applications, such as distribution panels and switchgear, due to its ease of installation and maintenance. These circuit breakers primarily function to connect and disconnect circuits, and to quickly cut off power in case of overload, short circuit, or other abnormal conditions, ensuring the safe operation of the electrical system. Their internal structure typically includes key components such as an operating mechanism, contact system, and arc-extinguishing device, ensuring effective suppression of electric arc generation and preventing damage during circuit interruption.

[0003] Especially in the field of communication infrastructure, frequent equipment upgrades and expansions necessitate the extensive use of easy-to-install plug-in circuit breakers. These circuit breakers often need to be installed in a compact arrangement within limited space. However, this high-density installation method also presents certain operational challenges. For example, when plugging or unplugging a circuit breaker, due to the close proximity of adjacent devices, operators may accidentally touch the switches of other circuit breakers, leading to unexpected circuit interruptions or other undesirable operations. Such misoperations not only disrupt normal workflows but may also pose potential risks to the stability of the communication system and the security of the equipment. Utility Model Content

[0004] The purpose of this invention is to overcome the defect of plug-in circuit breakers in densely installed environments that are easily accidentally triggered, and to further improve the arc extinguishing efficiency of circuit breakers, providing a plug-in circuit breaker with good safety and efficient arc extinguishing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-efficiency arc-extinguishing circuit breaker with good safety includes a circuit breaker body; the circuit breaker body is provided with a swingable actuator, the actuator is used to control the switching between the circuit breaker body's closed state and open state, and the circuit breaker is also provided with a locking component that acts on the actuator.

[0007] The locking assembly includes a push-button movable on an end face of the circuit breaker body. A first rack is connected to one side of the push-button. A transmission gear is rotatably mounted inside the circuit breaker body, meshing with the first rack. A locking shaft is slidably mounted inside the circuit breaker body, perpendicular to the first rack. A second rack is connected to one end of the locking shaft, also meshing with the transmission gear.

[0008] The locking shaft is provided with a protrusion for limiting the actuator to the lowest point of its stroke.

[0009] A tenon is provided on one side of the protrusion, and a corresponding locking hole is provided on the side wall of the actuating member. When the tenon is engaged with the locking hole, the actuating member cannot rotate.

[0010] The circuit breaker body is also provided with an arc-extinguishing cavity.

[0011] Through the above structure, this utility model incorporates a locking component inside the circuit breaker body. When the circuit breaker needs to be operated, the actuating block must first be pressed. Through the transmission of the rack and pinion gear, the locking shaft moves, causing the protrusion on the locking shaft to move away from the actuating component, thus releasing the lock on the actuating component. Only then can the circuit breaker be closed. The actuating component has a corresponding locking hole on its side wall. When the locking tenon engages with the locking hole, the actuating component cannot rotate. The cooperation between the locking tenon and the locking hole provides a secure lock, preventing accidental tripping. This effectively prevents the risk of accidentally activating the circuit breaker switch during insertion, removal, or maintenance, improving operational safety.

[0012] Furthermore, in order to improve the arc-extinguishing efficiency of the circuit breaker, the present invention also adopts the following technical solution:

[0013] The arc-extinguishing chamber is equipped with multiple arc-extinguishing plates arranged parallel to each other, and the arc-extinguishing plates are set at an inclined angle within the arc-extinguishing chamber. The inclined arc-extinguishing plates can more effectively divide and cool the electric arc, accelerating the extinction of the electric arc.

[0014] Preferably, the arc-extinguishing plate has a tapered guide groove. The tapered guide groove can guide the arc into the space between the arc-extinguishing plates more quickly, and the narrow channel can further cool and lengthen the arc, thereby improving the arc-extinguishing effect.

[0015] Furthermore, the locking component will prevent the actuator from being at its lowest point of travel, thus preventing the circuit breaker from being accidentally in the open state. A push spring is provided between the first rack and the circuit breaker body.

[0016] Furthermore, a push-pull ring is fixedly installed on the outer side of the pressing block.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention incorporates a locking component inside the circuit breaker, requiring the pressing of a trigger block to unlock before switching the circuit breaker's state. This structure effectively prevents accidental operation of the circuit breaker due to accidental contact with the actuator during operations such as plugging / unplugging or maintenance, thus ensuring operator safety and reducing the risk of equipment damage or system failure caused by misoperation. Especially in fields like telecommunications where circuit breakers are densely installed, this locking mechanism significantly reduces the possibility of accidentally activating adjacent circuit breaker switches, improving system reliability and stability. Furthermore, this invention features arc-extinguishing capability. The arc-extinguishing cavity is a crucial component for the safe and reliable operation of the circuit breaker. Its function is to effectively limit and extinguish the generated arc when the circuit breaker disconnects the circuit, preventing arc damage to equipment and ensuring the safe interruption of the circuit. Attached Figure Description

[0019] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0021] Figure 2 This is one of the three-dimensional structural schematic diagrams of the locking component in one embodiment of the present invention;

[0022] Figure 3 This is a second three-dimensional structural schematic diagram of the locking component in one embodiment of the present utility model;

[0023] Figure 4 This is the third three-dimensional structural schematic diagram of the locking component in one embodiment of the present utility model;

[0024] Figure 5 This is a cross-sectional view of an embodiment of the present invention;

[0025] Figure 6 This is a three-dimensional structural cross-sectional view of the arc-extinguishing plate in one embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Circuit breaker body;

[0028] 11. Action component; 111. Locking hole;

[0029] 12. Press block; 121. First rack; 122. Push spring; 123. Push-pull ring;

[0030] 13. Transmission gears;

[0031] 14. Locking shaft; 141. Second rack; 142. Protrusion; 143. Locking tenon;

[0032] 15. Arc-extinguishing cavity;

[0033] 151. Arc extinguishing plate; 1511. Flow guide groove; Detailed Implementation

[0034] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0035] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0036] Example 1

[0037] like Figure 1-6 As shown, this utility model provides a high-efficiency arc-extinguishing circuit breaker with good safety, which mainly includes a circuit breaker body 1. Inside the circuit breaker body 1 is a swingable actuator 11, which controls the on / off state of the circuit breaker. To improve operational safety, this utility model adds a locking component inside the circuit breaker.

[0038] The locking assembly includes a push-button block 12 movably mounted on the end face of the circuit breaker body 1. A first rack 121 is connected to one side of the push-button block 12. Inside the circuit breaker body 1, a rotatable transmission gear 13 is also provided, which meshes with the first rack 121. In addition, a slidable locking shaft 14 is also provided inside the circuit breaker body 1, which is perpendicular to the first rack 121. One end of the locking shaft 14 is connected to a second rack 141, which also meshes with the transmission gear 13.

[0039] The basic structure of a circuit breaker is known to those skilled in the art, so it will not be described in detail here.

[0040] A protrusion 142 is provided on the locking shaft 14, the position of which corresponds to the position of the actuator 11 in the closed state (lowest point of travel). When the push button 12 is pressed, the locking shaft 14 will be in the first position. When the actuator 11 swings downward to the lowest point of travel, the protrusion 142 will be misaligned with the actuator 11, and will not restrict the swing of the actuator 11. When the push button 12 is not pressed, the locking shaft 14 will be in the second position. At this time, due to the interference of the protrusion 142, the actuator 11 will not be able to reach the lowest point of travel, that is, the circuit breaker cannot be closed. Only when the push button 12 is pressed, the transmission gear 13 is driven to rotate through the first rack 121, and then the locking shaft 14 is driven to move to the first position through the second rack 141, can the circuit breaker be closed. The above configuration avoids accidental closing of the circuit breaker body 1 and improves the safety of use.

[0041] A latch 143 is provided on one side of the protrusion 142 on the locking shaft 14, and a locking hole 111 that mates with the latch 143 is provided on the side wall of the actuating member 11. When the actuating member 11 is at its lowest point of travel and the push block 12 is released, the latch 143 will engage in the locking hole 111. At this time, the actuating member 11 cannot rotate, that is, the circuit breaker body 1 is in the closed state, which avoids switching to the open state due to accidental contact, and further improves the safety of the circuit breaker.

[0042] To improve arc extinguishing efficiency, this invention incorporates an arc-extinguishing cavity 15 within the circuit breaker body 1. Within this cavity 15, multiple parallel arc-extinguishing plates 151 are arranged at a certain angle. These inclined plates effectively divide and cool the electric arc, accelerating its extinction. To further enhance the arc extinguishing effect, tapered guide grooves 1511 can be formed on the arc-extinguishing plates 151 to guide the electric arc more quickly into the space between the plates and extinguish it.

[0043] Without pressing the actuating element, the locking component will prevent the actuating element 11 from being at its lowest point of travel, thus preventing the circuit breaker from being accidentally in the open state. A push spring 122 is provided between the first rack 121 and the circuit breaker body 1. The push spring 122 always makes the protrusion 142 tend to move closer to the actuating element 11.

[0044] Example 2

[0045] This embodiment improves the movement method of the push block 12 based on embodiment 1. A push-pull ring 123 is provided on one side of the push block 12. The operator can move the push block 12 back and forth through the push-pull ring 123 to switch different locking states.

[0046] Based on the above description, those skilled in the art will understand that the high-efficiency arc-extinguishing circuit breaker with good safety disclosed in this utility model effectively avoids the risk of accidental operation and improves operational safety by setting a locking component; at the same time, by adopting an inclined arc-extinguishing plate 151 and a tapered guide groove 1511 structure, the arc-extinguishing efficiency and heat dissipation performance of the circuit breaker are significantly improved.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A high-efficiency arc-extinguishing circuit breaker with good safety, comprising a circuit breaker body; wherein a swingable actuator is disposed within the circuit breaker body, the actuator being used to control the switching between the circuit breaker body's closed and open states, characterized in that: The circuit breaker is also equipped with a locking component that acts on the actuating element; The locking assembly includes a push-button that can be pressed onto the end face of the circuit breaker body. A first rack is connected to one side of the push-button. A transmission gear is rotatably mounted inside the circuit breaker body and meshes with the first rack. A locking shaft is slidably mounted inside the circuit breaker body. The locking shaft is perpendicular to the first rack. A second rack is connected to one end of the locking shaft and meshes with the transmission gear. The locking shaft has a protrusion for limiting the actuating element to the lowest point of its stroke. A tenon is provided on one side of the protrusion, and a corresponding locking hole is provided on the side wall of the actuating member. When the tenon is engaged with the locking hole, the actuating member cannot rotate. The circuit breaker body is also provided with an arc-extinguishing cavity.

2. The high-efficiency arc-extinguishing circuit breaker with good safety according to claim 1, characterized in that, The arc-extinguishing cavity is provided with multiple arc-extinguishing plates arranged in parallel to each other, and the arc-extinguishing plates are arranged at an inclined angle in the arc-extinguishing cavity.

3. The high-efficiency arc-extinguishing circuit breaker with good safety according to claim 2, characterized in that, The arc-extinguishing plate has a tapered guide groove.

4. The high-efficiency arc-extinguishing circuit breaker with good safety according to claim 1, characterized in that, A push spring is provided between the first rack and the circuit breaker body.

5. The high-efficiency arc-extinguishing circuit breaker with good safety according to claim 1, characterized in that, A push-pull ring is fixedly installed on the side of the actuating block facing outwards.

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