Circuit breaker

Abstract

The invention provides a circuit breaker, relates to the technical field of switches, and is used for effectively reducing the risk of clamping stagnation failure of an operating mechanism and improving the reliability of the circuit cut-off of the circuit breaker. The circuit breaker comprises a shell, a moving contact, an arc extinguishing assembly and a blocking curtain. The shell is provided with a base and a cover body, and the base and the cover body define a containing cavity. The moving contact is provided with a rotating end and a contact end which are oppositely arranged, and the moving contact is provided with a contact position and a separation position relative to the base. When the moving contact is located at the contact position, the moving contact is in contact with a static contact of the circuit breaker, and when the moving contact is located at the separation position, the moving contact is separated from the static contact. A receding opening is formed in the side, close to the moving contact, of the arc extinguishing assembly, and the contact end is arranged at the position of the receding opening. The blocking curtain has a blocking state and a retracting state. And when the moving contact is in the contact position, the blocking curtain is in a retracted state. And when the moving contact is in the separation position, the blocking curtain is in a blocking state and corresponds to the avoiding opening.

Description

Technical Field

[0001] This application relates to the field of switch technology, specifically to a circuit breaker. Background Technology

[0002] A circuit breaker is an electrical device used to protect and control circuits. Its main function is to safely connect, carry, and disconnect the current in a circuit under normal or fault conditions, thereby ensuring electrical safety.

[0003] A circuit breaker generally includes a moving contact, a stationary contact, an operating mechanism, and an arc-extinguishing assembly. The moving contact is located at the drive end of the operating mechanism, which drives the moving contact to rotate, causing it to make or disengage from the stationary contact. When the moving contact is in contact with the stationary contact, the circuit breaker is connected, and the circuit breaker is in normal operating condition. In the event of a short circuit or overload in the circuit, the moving contact disengages from the stationary contact to interrupt the current in the circuit. During the disengagement process, i.e., when the circuit breaker trips, an electric arc is generated, which is extinguished by the arc-extinguishing assembly. Simultaneously, high-temperature, high-pressure gases and metal particles are also generated along with the arc.

[0004] In existing technologies, there is a high risk that metal particles may enter the operating mechanism, causing it to jam and fail. Additionally, there is a tendency for the moving and stationary contacts to be damaged by electric arcing, resulting in an inability to reliably disconnect the circuit. Summary of the Invention

[0005] This application provides a circuit breaker that improves the reliability of circuit breaking while effectively reducing the risk of operating mechanism jamming failure.

[0006] To achieve the above objectives, this application provides a circuit breaker comprising a housing, a moving contact, an arc-extinguishing assembly, and a blocking curtain. The housing has a base and a cover, which enclose a receiving cavity.

[0007] The moving contact has a rotating end and a contact end that are arranged opposite to each other, with the rotating end rotatably mounted on the base. The moving contact has a contact position and a disengaged position relative to the base. When the moving contact is in the contact position, it is in contact with the stationary contact of the circuit breaker; when the moving contact is in the disengaged position, it is out of contact with the stationary contact.

[0008] The arc-extinguishing assembly is housed within the receiving cavity. A clearance opening is provided on the side of the arc-extinguishing assembly closest to the moving contact, and the contact end is positioned at the clearance opening.

[0009] One end of the barrier curtain is movably mounted on the moving contact, and the other end is mounted on the base. The barrier curtain has a blocking state and a retracted state. When the moving contact is in the contact position, the barrier curtain is in the retracted state. When the moving contact is in the disengaged position, the barrier curtain is in the blocking state, and the barrier curtain corresponds to the clearance opening.

[0010] When the above technical solution is adopted, during the process of the moving contact rotating from the contact position to the disengagement position, one end of the blocking curtain moves synchronously with the moving contact, and correspondingly, this end of the blocking curtain can move relative to the base. The other end of the blocking curtain is located on the base. When the moving contact moves, the two ends of the blocking curtain will experience relative movement, causing the blocking curtain to be pulled open with the movement of the moving contact, thus switching the blocking curtain from the retracted state to the blocking state.

[0011] During the rotation of the moving contact from the disengaged position to the contact position, one end of the blocking curtain moves synchronously with the moving contact, and correspondingly, one end of the blocking curtain moves relative to the base. The other end of the blocking curtain is located on the base, so that the blocking curtain is retracted with the movement of the moving contact, thus switching the blocking curtain from the blocking state to the retracted state.

[0012] When the moving contact is in the disengaged position and the blocking curtain is in the blocking state, the blocking curtain corresponds to the clearance opening, which can achieve the sealing of the clearance opening.

[0013] Thus, on the one hand, the barrier curtain can effectively prevent electric arcs, high-temperature and high-pressure gases, and metal particles from spreading to the rotating end of the moving contact through the clearance opening, thus isolating the electric arcs, high-temperature and high-pressure gases, and metal particles from the operating mechanism and reducing the risk of the operating mechanism jamming and failing.

[0014] Meanwhile, the barrier curtain acts as a barrier to block the high-temperature and high-pressure gas, which accelerates the flow of the gas toward the arc-extinguishing component. This further drives the arc to quickly enter the arc-extinguishing component, reducing the time the arc stays between the moving and stationary contacts. This not only reduces the possibility of arc erosion of the moving and stationary contacts, but also reduces the probability of the moving and stationary contacts being broken down by the arc, thus failing to reliably cut off the circuit.

[0015] Furthermore, the barrier curtain does not affect the travel of the moving contact as it rotates between the contact and disengagement positions. Simultaneously, one end of the barrier curtain is movably positioned relative to the moving contact, eliminating the need for a travel opening on the barrier curtain for the moving contact to rotate. When the moving contact rotates, it will not cause tearing, ripping, or other damage to the barrier curtain, thus ensuring its blocking and isolation function and extending its service life.

[0016] In one possible implementation, the circuit breaker further includes a first U-shaped link, which comprises two opposing first and second links. The first link is rotatably mounted on the moving contact. The second link is connected to the barrier curtain.

[0017] When the above technical solution is adopted, the first connecting rod is rotatably mounted on the moving contact, and the second connecting rod is connected to the barrier curtain. That is to say, the barrier curtain is rotatably connected to the moving contact through the first U-shaped connecting rod.

[0018] The first U-shaped connecting rod not only facilitates the installation and connection of the barrier curtain and the moving contact, but also, compared to a fixed connection between the barrier curtain and the moving contact, the rotatable connection between the barrier curtain and the moving contact via the first U-shaped connecting rod increases the flexibility of the barrier curtain's movement. Simultaneously, it provides a buffer during the process of the barrier curtain transitioning from the retracted to the open state, making the barrier curtain's movement smoother and less prone to damage.

[0019] In one possible implementation, the moving contact has a protrusion on the side near the blocking curtain. The protrusion is located between the contact end and the rotating end. When the blocking curtain is in the retracted state, the protrusion serves to block and limit the second link, such that the second link is located on the side of the protrusion away from the contact end.

[0020] When the above technical solution is adopted, the moving contact is in contact with the stationary contact when the barrier curtain is in the retracted state. However, in this application, the protrusion blocks and limits the second link connected to the barrier curtain to the side away from the contact end, which can reduce the possibility that the barrier curtain in the retracted state is located between the moving contact and the stationary contact, and avoid the barrier curtain interfering with the contact between the moving contact and the stationary contact, so as not to affect the reliability of the circuit breaker.

[0021] In one possible implementation, the circuit breaker further includes a second U-shaped link, which comprises two opposing third and fourth links. The third links are rotatably mounted on the base. The fourth link is connected to the barrier curtain.

[0022] When the above technical solution is adopted, the third connecting rod is rotatably mounted on the base, and the fourth connecting rod is connected to the barrier curtain. That is to say, the barrier curtain is rotatably connected to the base through the second U-shaped connecting rod.

[0023] Thus, the second U-shaped connecting rod not only facilitates the installation and connection of the curtain and the base, but also, compared to a fixed connection between the curtain and the base, the rotatable connection of the curtain to the base via the second U-shaped connecting rod increases the flexibility of the curtain's movement. Simultaneously, it provides a buffer during the curtain's transition from the retracted to the open state, resulting in smoother movement and reducing the risk of damage.

[0024] In one possible implementation, a connecting part is provided inside the base, and a connecting hole is provided on the connecting part, with the third connecting rod rotatably disposed in the connecting hole.

[0025] When adopting the above technical solution, the connection hole facilitates the installation and connection of the second U-shaped connecting rod with the connecting part. Simultaneously, the connection hole serves as an installation guide, providing a clear installation position for the second U-shaped connecting rod, making the assembly process simpler and faster.

[0026] In one possible implementation, the second U-shaped link further includes a fifth link, the two ends of which are connected to one end of the third link and one end of the fourth link, respectively.

[0027] A limiting groove is provided at the end of the connecting part near the cover. The limiting groove communicates with the connecting hole. The fifth link is rotatably mounted within the limiting groove. The limiting groove has a limiting wall on the side near the arc extinguishing component, and the limiting wall is inclined towards the contact end along the direction from the base to the cover. When the blocking curtain is in the blocking state, the limiting wall is used to block and limit the fifth link.

[0028] When the above technical solution is adopted, during the process of the moving contact switching from the disengaged position to the contact position and the blocking curtain switching from the blocking state to the retracted state, the fifth link will not rotate towards the contact end. Furthermore, under the gravity of the blocking curtain, the fifth link can rotate away from the contact end, thus causing the blocking curtain to shift away from the contact end during retraction. This reduces the possibility of the blocking curtain in the retracted state being located between the moving and stationary contacts, avoiding interference between the blocking curtain and the moving and stationary contacts, and thus preventing any impact on the reliability of the circuit breaker.

[0029] In one possible implementation, a storage groove is also provided within the base, into which the curtain is stored when it is in the retracted state. The storage groove is located on the side of the connector away from the contact end.

[0030] When the above technical solution is adopted, the barrier curtain is located in the storage slot when it is in the retracted state, and the space inside the housing is clearly divided, avoiding a cluttered appearance. At the same time, it reduces the possibility of the barrier curtain's position being arbitrary and affecting the circuit breaker's heat dissipation and other performance characteristics.

[0031] In one possible implementation, the circuit breaker further includes a baffle for dividing the housing's receiving cavity into a first receiving cavity and a second receiving cavity. The moving contact, arc-extinguishing assembly, and blocking curtain are all located in the second receiving cavity.

[0032] The operating mechanism of the circuit breaker is located on a baffle, which has an opening. The driving end of the operating mechanism extends into the second receiving cavity through the opening.

[0033] When the above technical solution is adopted, the opening is designed to allow the driving end of the operating mechanism to extend into the second receiving cavity through the opening, so that the operating mechanism can directly or indirectly contact the moving contact, and the power and motion of the operating mechanism can be transmitted to the moving contact.

[0034] The baffle isolates the operating mechanism from the moving contact and arc-extinguishing components. When the circuit breaker trips, the high-temperature, high-pressure gas and metal particles generated flow to the baffle. The baffle blocks the gas flowing towards the operating mechanism, preventing it from spreading further into the main body of the operating mechanism, reducing the possibility of the operating mechanism being burned by the high-temperature, high-pressure gas, and ensuring the structural strength of the operating mechanism.

[0035] At the same time, metal particles can be blocked by the baffle, which helps to achieve electrical isolation of the operating mechanism, reduce the probability of the operating mechanism becoming energized, and effectively reduce the risk of the operating mechanism jamming and failing.

[0036] The baffles and barrier curtains can prevent metal particles and high-temperature, high-pressure gases from spreading to the main body of the operating mechanism, thereby reducing damage to the operating mechanism, minimizing safety hazards of the circuit breaker, and extending the service life of the circuit breaker.

[0037] In one possible implementation, the side of the baffle near the second receiving cavity is provided with a mating surface, and when the moving contact is in the disengaged position, the side of the moving contact near the cover is in contact with the mating surface.

[0038] When the above technical solution is adopted, the moving contact will impact the baffle during the process of switching from the contact position to the disengagement position. The inclined surface can increase the contact area between the moving contact and the baffle, reduce the stress on the baffle, and avoid stress concentration.

[0039] Furthermore, when the moving contact is in the disengaged position, the side of the moving contact closest to the cover is in contact with the mating surface, and the blocking curtain corresponds to the clearance opening. At this time, the airtightness at the clearance opening is improved, effectively preventing electric arcs, high-temperature and high-pressure gases, and metal particles from diffusing to the rotating end of the moving contact through the clearance opening. This isolates the electric arc, high-temperature and high-pressure gases, and metal particles from the operating mechanism, reducing the risk of the operating mechanism jamming and failure. Simultaneously, it further accelerates the entry of the electric arc into the arc-extinguishing assembly, extinguishing the arc as quickly as possible.

[0040] In one possible implementation, the barrier curtain is an elastic barrier curtain.

[0041] When the above technical solution is adopted, the barrier curtain itself has a buffering effect during the process of switching from the retracted state to the blocking state, reducing the possibility of damage to the barrier curtain caused by pulling and tugging.

[0042] At the same time, when the curtain is in the retracted state, it occupies less space and is easy to store.

[0043] In one possible implementation, the barrier curtain includes multiple folded sections connected end-to-end. When the barrier curtain is in the blocking state, the multiple folded sections are arranged sequentially along the direction from the base to the cover. When the barrier curtain is in the retracted state, the multiple folded sections are stacked together along the direction from the base to the cover.

[0044] When the above technical solution is adopted, multiple folded sections can be stacked together when the curtain is in the retracted state, the curtain occupies less space and is easy to store. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the circuit breaker provided in an embodiment of this application.

[0046] Figure 2 This is a cross-sectional view of the circuit breaker when the moving contact is in the disengaged position, as provided in an embodiment of this application.

[0047] Figure 3 This is a cross-sectional view of the circuit breaker when the moving contact is in the contact position, as provided in the embodiments of this application.

[0048] Figure 4 Schematic diagram of the positional relationship between the moving contact and the first U-shaped connecting rod provided in the embodiments of this application. Figure 1 .

[0049] Figure 5 Schematic diagram of the positional relationship between the moving contact and the first U-shaped connecting rod provided in the embodiments of this application. Figure 2 .

[0050] Figure 6 This is a schematic diagram of the structure of the first U-shaped connecting rod provided in an embodiment of this application.

[0051] Figure 7 This is a schematic diagram showing the positional relationship between the base and the second U-shaped connecting rod provided in an embodiment of this application.

[0052] Figure 8 for Figure 7 Enlarged diagram of point A in the middle.

[0053] Figure 9 This is a schematic diagram of the structure of the second U-shaped connecting rod provided in an embodiment of this application.

[0054] Figure 10 This is a partial structural diagram of the base provided in an embodiment of this application.

[0055] Figure 11 for Figure 10 Enlarged diagram of point B in the middle.

[0056] Explanation of reference numerals in the attached figures: 1-Shell, 11-Base, 111-Connecting part, 1111-Connecting hole, 1112-Limiting groove, 112-Receiving groove, 12-Lid, 2-Moving contact, 21-Protrusion, 3-Arc extinguishing assembly, 4-Stationary contact, 5-Blocking curtain, 6-First U-shaped connecting rod 61 - First link, 62 - Second link, 7 - Second U-shaped link, 71 - Third link, 72 - Fourth link, 73 - Fifth link. 8-Baffle, 9-Operating mechanism. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0059] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0061] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0062] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0063] When a short circuit or overload occurs in the circuit where the circuit breaker is located, an electric arc will be generated during the process of the moving contact and the stationary contact separating. At the same time, high-temperature and high-pressure gas and metal particles will also be generated along with the electric arc.

[0064] The arc-extinguishing assembly of the circuit breaker has a clearance opening, and the contact end of the moving contact is located at the clearance opening. At the same time, the clearance opening also provides travel space for the moving contact.

[0065] Electric arcs, high-temperature and high-pressure gases, and metal particles can diffuse along the moving contact to its rotating end through the clearance port. Furthermore, metal particles can enter the operating mechanism, causing it to jam and malfunction. Simultaneously, the electric arc can move along the moving contact, potentially causing the moving and stationary contacts to break down, resulting in unreliable circuit disconnection.

[0066] In view of the problems existing in the above-mentioned prior art, please combine with Figures 1 to 3 As shown in the figure, this application provides a circuit breaker, which includes a housing 1, a moving contact 2, an arc extinguishing assembly 3, and a blocking curtain 5.

[0067] The shell 1 has a base 11 and a cover 12, which together form a receiving cavity.

[0068] The structure and dimensions of the housing 1 are not specifically limited here. The material of the housing 1 can be an insulating material; for example, the material of the housing 1 can be insulating plastic, but it is not limited to this. The structure and specific dimensions of the cover 12 and the base 11 are also not specifically limited here, and shall be subject to the actual situation.

[0069] The cover 12 can be placed on the base 11. The connection method between the base 11 and the cover 12 is not specifically limited here. For example, the cover 12 and the base 11 can be connected together by welding, snap-fitting, riveting or screw connection.

[0070] In fact, the moving contact 2, the arc extinguishing component 3, and the blocking curtain 5 provided in the embodiments of this application are all disposed in the receiving cavity of the housing 1.

[0071] Thus, housing 1 can enclose moving contact 2, arc extinguishing assembly 3, and barrier curtain 5, providing a stable space for them and ensuring their normal operation without external interference. Simultaneously, housing 1 provides positioning and support for moving contact 2, arc extinguishing assembly 3, and barrier curtain 5, preventing displacement or damage to components within housing 1 during operation.

[0072] The housing 1 can also withstand a certain amount of external pressure, protecting the moving contact 2, the arc-extinguishing assembly 3, and the barrier curtain 5 from damage. In addition, the housing 1 has a protective function, preventing moisture, dust, dirt, and other impurities from entering the housing 1, thereby avoiding corrosion or damage to the moving contact 2, the arc-extinguishing assembly 3, and the barrier curtain 5 installed inside the housing 1.

[0073] The moving contact 2 provided in this embodiment has a rotating end and a contact end disposed opposite to each other, with the rotating end rotatably disposed on the base 11. The specific structure and dimensions of the moving contact 2 are not specifically limited here. The manner in which the moving contact 2 is rotatably disposed on the base 11 is also not specifically limited here.

[0074] The moving contact 2 has a contact position and a disengaged position relative to the base 11. When the moving contact 2 is in the contact position, the moving contact 2 is in contact with the stationary contact 4 of the circuit breaker, the circuit of the circuit breaker is connected, and the circuit breaker is in normal working condition.

[0075] When the moving contact 2 is in the disengaged position, the moving contact 2 is no longer in contact with the stationary contact 4, the circuit of the circuit breaker is disconnected, and the circuit breaker is in the open state.

[0076] The specific structure and dimensions of the arc-extinguishing assembly 3 are not specifically limited here. The arc-extinguishing assembly 3 can be fixedly installed in the receiving cavity. A clearance opening is provided on the side of the arc-extinguishing assembly 3 near the moving contact 2, and the contact end of the moving contact 2 is located at the clearance opening.

[0077] The structure and size of the clearance opening can be matched with the structure of the moving contact 2 and the rotation path that the moving contact 2 switches between the contact position and the disengagement position.

[0078] One end of the barrier curtain 5 is movably disposed on the moving contact 2. That is, when the moving contact 2 rotates and switches between the contact position and the disengagement position, one end of the barrier curtain 5 can move synchronously with the moving contact 2.

[0079] The connection method between one end of the barrier curtain 5 and the moving contact 2 is not specifically limited here. For example, welding, bonding, or screw connection can be used to connect one end of the barrier curtain 5 to the moving contact 2. Of course, the connection method between the barrier curtain 5 and the moving contact 2 is only an example and is not actually limited to this.

[0080] The other end of the barrier curtain 5 is disposed on the base 11. The connection method between the other end of the barrier curtain 5 and the base 11 is not specifically limited here. For example, welding, bonding, screw connection, etc. can be used to connect the other end of the barrier curtain 5 to the base 11. Of course, the connection method between the barrier curtain 5 and the base 11 is only an example for illustration and is not limited to this in practice.

[0081] The barrier curtain 5 has a blocking state and a retracted state. For details, please refer to [link / reference needed]. Figure 3 As shown, when the moving contact 2 is in the contact position, the moving contact 2 is in contact with the stationary contact 4, and the blocking curtain 5 is in the retracted state. Please refer to... Figure 2 As shown, when the moving contact 2 is in the disengaged position, the moving contact 2 is out of contact with the stationary contact 4, the blocking curtain 5 is in the blocking state, and the blocking curtain 5 corresponds to the clearance opening.

[0082] From the moving contact 2 Figure 3 The contact position shown is towards Figure 2 During the rotational switching process of the disengaged position shown, one end of the blocking curtain 5 moves synchronously with the moving contact 2, and correspondingly, this end of the blocking curtain 5 can move relative to the base 11. The other end of the blocking curtain 5 is located on the base 11. When the moving contact 2 moves, the two ends of the blocking curtain 5 will experience relative movement, causing the blocking curtain 5 to be pulled open with the movement of the moving contact 2, thus switching the blocking curtain 5 from the retracted state to the blocking state.

[0083] From the moving contact 2 Figure 2 The shown disengagement position is towards Figure 3 During the rotational switching of the contact position shown, one end of the blocking curtain 5 moves synchronously with the moving contact 2, and correspondingly, one end of the blocking curtain 5 moves relative to the base 11. The other end of the blocking curtain 5 is set on the base 11, so that the blocking curtain 5 is retracted with the movement of the moving contact 2, and the blocking curtain 5 switches from the blocking state to the retracted state.

[0084] When the moving contact 2 is in the disengaged position and the blocking curtain 5 is in the blocking state, the blocking curtain 5 corresponds to the clearance opening, which can achieve the sealing of the clearance opening.

[0085] Thus, on the one hand, the setting of the barrier curtain 5 can effectively prevent electric arc, high temperature and high pressure gas and metal particles from spreading to the rotating end of the moving contact 2 through the avoidance port, and isolate the electric arc, high temperature and high pressure gas and metal particles from the operating mechanism 9, reducing the risk of the operating mechanism 9 jamming and failing.

[0086] Meanwhile, the barrier curtain 5 acts as a barrier to block the high-temperature and high-pressure gas, which can accelerate the flow of the high-temperature and high-pressure gas toward the arc extinguishing component 3. Furthermore, it can drive the arc to quickly enter the arc extinguishing component 3, reducing the time the arc stays between the moving contact 2 and the stationary contact 4. This not only reduces the possibility of the arc burning the moving contact 2 and the stationary contact 4, but also reduces the probability that the moving contact 2 and the stationary contact 4 will be broken down by the arc and unable to reliably cut off the circuit.

[0087] Furthermore, the installation of the barrier curtain 5 does not affect the travel of the moving contact 2 as it rotates between the contact and disengagement positions. Simultaneously, one end of the barrier curtain 5 is movably mounted on the moving contact 2, eliminating the need for a travel opening on the barrier curtain 5 for the moving contact 2 to rotate. When the moving contact 2 rotates, it will not cause tearing, ripping, or other damage to the barrier curtain 5, thus ensuring its blocking and isolation function and extending its service life.

[0088] As one possible implementation method, please combine Figures 3 to 5 As shown, the circuit breaker provided in this embodiment of the application further includes a first U-shaped link 6, which includes two opposing first links 61 and second links 62.

[0089] The connection method between the first link 61 and the second link 62 is not specifically limited here. For example, the first link 61 and the second link 62 can be connected together by welding, threaded connection, or other methods. Of course, the first link 61 and the second link 62 can also be machined together, i.e., the first U-shaped link 6 is a one-piece structure. The first U-shaped link 6 can also be machined by bending.

[0090] The first connecting rod 61 is rotatably mounted on the moving contact 2. Specifically, a mounting hole that mates with the first connecting rod 61 can be formed on the moving contact 2. The first connecting rod 61 can be rotatably mounted within the mounting hole.

[0091] The second link 62 is connected to the barrier curtain 5. The connection method between the second link 62 and the barrier curtain 5 is not specifically limited here. For example, the second link 62 and the barrier curtain 5 can be connected by wrapping, bonding, or screw connection.

[0092] Of course, the blocking curtain 5 can also be rotatably connected to the second link 62, which is not specifically limited here.

[0093] The first connecting rod 61 is rotatably mounted on the moving contact 2, and the second connecting rod 62 is connected to the barrier curtain 5. That is to say, the barrier curtain 5 is rotatably connected to the moving contact 2 through the first U-shaped connecting rod 6.

[0094] Thus, the first U-shaped connecting rod 6 not only facilitates the installation and connection of the barrier curtain 5 and the moving contact 2, but also, compared to a fixed connection between the barrier curtain 5 and the moving contact 2, the rotatable connection between the barrier curtain 5 and the moving contact 2 via the first U-shaped connecting rod 6 increases the flexibility of the barrier curtain 5's movement. Simultaneously, it provides a buffer during the process of the barrier curtain 5 moving from the retracted state to the open state, making the movement of the barrier curtain 5 smoother and less prone to damage.

[0095] In some embodiments, please combine Figures 2 to 5 As shown, the moving contact 2 has a protrusion 21 on the side near the blocking curtain 5.

[0096] In specific implementation, the manner in which the protrusion 21 is disposed on the moving contact 2 is not specifically limited here. For example, the protrusion 21 can be disposed on the moving contact 2 by means of welding, snap-fitting, or screw connection.

[0097] Of course, in practice, the moving contact 2 and the protrusion 21 can also be machined together. That is, the moving contact 2 is a one-piece structure.

[0098] The protrusion 21 is located between the contact end and the rotating end. When the barrier curtain 5 is in the retracted state, the protrusion 21 is used to block and limit the second link 62, so that the second link 62 is located on the side of the protrusion 21 away from the contact end.

[0099] When the barrier curtain 5 is in the retracted state, the moving contact 2 is in the contact state, and the moving contact 2 is in contact with the stationary contact 4. In this application, the protrusion 21 blocks and limits the second connecting rod 62 connected to the barrier curtain 5 to the side away from the contact end, which can reduce the possibility that the barrier curtain 5 in the retracted state is located between the moving contact 2 and the stationary contact 4, and avoid the barrier curtain 5 interfering with the contact between the moving contact 2 and the stationary contact 4, so as not to affect the reliability of the circuit breaker.

[0100] The specific structure and dimensions of the protrusion 21 are not specifically limited here. It should be noted that in the embodiments provided in this application, reference can be made to... Figure 4 and Figure 5 As shown, the first link 61 is located on the side of the protrusion 21 closer to the contact end, and the second link 62 is located on the side of the protrusion 21 away from the contact end.

[0101] As a feasible approach, please combine Figure 2 , Figure 3 , Figures 7 to 9 As shown, the circuit breaker provided in this application embodiment also includes a second U-shaped link 7, which includes two opposing third links 71 and fourth links 72.

[0102] The connection method between the third link 71 and the fourth link 72 is not specifically limited here. For example, the third link 71 and the fourth link 72 can be connected together by welding, threaded connection, or other methods. Of course, the third link 71 and the fourth link 72 can also be machined together, meaning the second U-shaped link 7 is a one-piece structure. The second U-shaped link 7 can also be machined by bending.

[0103] The third link 71 is rotatably mounted on the base 11. The fourth link 72 is connected to the barrier curtain 5.

[0104] The fourth link 72 is connected to the barrier curtain 5. The connection method between the fourth link 72 and the barrier curtain 5 is not specifically limited here. For example, the fourth link 72 and the barrier curtain 5 can be connected by wrapping, bonding, or screw connection.

[0105] Of course, the blocking curtain 5 can also be rotatably connected to the fourth link 72, which is not specifically limited here.

[0106] The third link 71 is rotatably mounted on the base 11, and the fourth link 72 is connected to the barrier curtain 5. That is to say, the barrier curtain 5 is rotatably connected to the base 11 through the second U-shaped link 7.

[0107] Thus, the second U-shaped connecting rod 7 not only facilitates the installation and connection of the barrier curtain 5 and the base 11, but also, compared to a fixed connection between the barrier curtain 5 and the base 11, the rotatable connection of the barrier curtain 5 to the base 11 via the second U-shaped connecting rod 7 increases the flexibility of the barrier curtain 5's movement. Simultaneously, it provides a buffer during the process of the barrier curtain 5 moving from the retracted state to the open state, making the movement of the barrier curtain 5 smoother and less prone to damage.

[0108] In one example, such as Figure 10 and Figure 11 As shown, a connecting part 111 is provided inside the base 11. The manner in which the connecting part 111 is disposed on the base 11 is not specifically limited here. Exemplarily, the connecting part 111 can be disposed on the base 11 by means of welding, snap-fitting, bonding, or screw connection. Of course, in specific implementation, the connecting part 111 can also be formed together with the base 11.

[0109] Please combine Figure 7 , Figure 8 and Figure 11 As shown, a connecting hole 1111 is provided on the connecting part 111, and the third connecting rod 71 is rotatably disposed in the connecting hole 1111.

[0110] The connection hole 1111 facilitates the installation and connection of the second U-shaped connecting rod 7 with the connecting part 111. At the same time, the connection hole 1111 serves as an installation guide, providing a clear installation position for the second U-shaped connecting rod 7, making the assembly process simpler and faster.

[0111] The dimensions and structure of the connecting part 111 and the connecting hole 1111 are not limited here, and the specific details shall be subject to the actual situation.

[0112] As a feasible approach, such as Figure 9 As shown, the second U-shaped link 7 also includes a fifth link 73, the two ends of which are connected to one end of the third link 71 and one end of the fourth link 72, respectively.

[0113] The connection method between the fifth link 73 and the third link 71 is not specifically limited here. For example, the fifth link 73 and the third link 71 can be connected together by welding, threaded connection, or other methods.

[0114] Accordingly, the connection method between the fifth link 73 and the fourth link 72 is not specifically limited here. For example, the fifth link 73 and the fourth link 72 can be connected together by welding, threaded connection, or other methods.

[0115] In the embodiments provided in this application, the second U-shaped link 7 is an integral structure, that is, the third link 71, the fourth link 72 and the fifth link 73 are processed together.

[0116] This design not only avoids stress concentration issues caused by threaded or welded connections, ensuring higher dimensional accuracy and consistency, but also enhances the structural strength of the second U-shaped connecting rod 7. Furthermore, the integrated structure reduces connection points, lowering the risk of failure due to loose connections, corrosion, or fatigue, and improving fatigue resistance. Additionally, it reduces the number of parts and assembly steps for the second U-shaped connecting rod 7, simplifying the operational process.

[0117] A limiting groove 1112 is provided at one end of the connecting part 111 near the cover 12. The limiting groove 1112 communicates with the connecting hole 1111. The fifth connecting rod 73 is rotatably disposed within the limiting groove 1112. The limiting groove 1112 has a limiting wall on the side near the arc extinguishing component 3, and the limiting wall is inclined towards the contact end along the direction from the base 11 to the cover 12. When the blocking curtain 5 is in the blocking state, the limiting wall is used to block and limit the fifth connecting rod 73.

[0118] Thus, during the process of the moving contact 2 switching from the disengaged position to the contact position and the blocking curtain 5 switching from the blocking state to the retracted state, the fifth link 73 will not rotate towards the contact end. Furthermore, under the weight of the blocking curtain 5, the fifth link 73 can rotate away from the contact end, causing the blocking curtain 5 to shift away from the contact end during retraction. This reduces the possibility of the blocking curtain 5 being located between the moving contact 2 and the stationary contact 4 in the retracted state, preventing the blocking curtain 5 from interfering with the contact between the moving contact 2 and the stationary contact 4, thereby ensuring the reliability of the circuit breaker.

[0119] In some embodiments, such as Figure 2 , Figure 3 , Figure 10 and Figure 11 As shown, a storage groove 112 is also provided inside the base 11. When the curtain 5 is in the retracted state, the curtain 5 is stored in the storage groove 112. The storage groove 112 is located on the side of the connecting part 111 away from the contact end.

[0120] Thus, when the barrier curtain 5 is in the retracted state, it is located within the storage slot 112, and the space within the housing 1 is clearly divided, avoiding a cluttered appearance. At the same time, this reduces the possibility of the barrier curtain 5 being positioned arbitrarily, potentially affecting the circuit breaker's heat dissipation and other performance characteristics.

[0121] In specific implementation, the limiting groove 1112 is located at the top of the connecting part 111, and the side of the limiting groove 1112 facing the receiving groove 112 is an open end. In this case, when the moving contact 2 rotates from the disengaged position to the contact position, under the gravity of the blocking curtain 5, the fourth connecting rod 72 can rotate into the receiving groove, which further helps to drive the blocking curtain 5 into the receiving groove 112, ensuring that the blocking curtain 5 enters the receiving groove 112 smoothly and completely, and avoiding interference of the blocking curtain 5 with the contact between the moving contact 2 and the stationary contact 4.

[0122] In one possible implementation, the circuit breaker provided in this application embodiment further includes a baffle 8, such as... Figure 1 and Figure 2 As shown, the baffle 8 is used to divide the housing 1 into a first housing cavity and a second housing cavity. The moving contact 2, the arc extinguishing assembly 3, and the blocking curtain 5 are all located in the second housing cavity.

[0123] The operating mechanism 9 of the circuit breaker is located on the baffle 8, and the baffle 8 has an opening. The driving end of the operating mechanism 9 extends into the second receiving cavity through the opening.

[0124] In fact, the main body of the operating mechanism 9 is located in the first receiving cavity, and the main body of the operating mechanism 9 is mounted on the baffle 8.

[0125] The specific structure and dimensions of the baffle 8 are not specifically limited here, and shall be subject to the actual situation. In specific implementation, the baffle 8 can be set between the base 11 and the cover 12.

[0126] The opening allows the drive end of the operating mechanism 9 to extend into the second receiving cavity through the opening, so that the operating mechanism 9 can directly or indirectly contact the moving contact 2, and the power and movement of the operating mechanism 9 can be transmitted to the moving contact 2.

[0127] The baffle 8 isolates the operating mechanism 9 from the moving contact 2 and the arc-extinguishing assembly 3. When the circuit breaker disconnects, the high-temperature and high-pressure gas and metal particles generated flow to the position of the baffle 8. The baffle 8 blocks the gas flowing towards the operating mechanism 9, preventing the high-temperature and high-pressure gas from continuing to diffuse into the main body of the operating mechanism 9, reducing the possibility of the operating mechanism 9 being burned by the high-temperature and high-pressure gas, and ensuring the structural strength of the operating mechanism 9.

[0128] At the same time, metal particles can be blocked by baffle 8, which helps to achieve electrical isolation of operating mechanism 9, reduce the probability of operating mechanism 9 being electrified, and effectively reduce the risk of operating mechanism 9 jamming and failure.

[0129] The baffle 8 and the blocking curtain 5 can prevent metal particles and high-temperature and high-pressure gases from spreading to the main body of the operating mechanism 9, reduce damage to the operating mechanism 9, reduce the safety hazards of the circuit breaker, and extend the service life of the circuit breaker.

[0130] As one possible approach, the side of the baffle 8 near the second receiving cavity is provided with a mating surface, and when the moving contact 2 is in the disengaged position, the side of the moving contact 2 near the cover 12 is in contact with the mating surface.

[0131] Thus, when the moving contact 2 switches from the contact position to the disengagement position, the moving contact 2 will impact the baffle 8. The inclined surface increases the contact area between the moving contact 2 and the baffle 8, reduces the stress on the baffle 8, and avoids stress concentration.

[0132] Furthermore, when the moving contact 2 is in the disengaged position, the side of the moving contact 2 closest to the cover 12 is in contact with the mating surface, and the blocking curtain 5 corresponds to the clearance opening. At this time, the airtightness at the clearance opening position can be improved, effectively preventing electric arcs, high-temperature and high-pressure gases, and metal particles from diffusing to the rotating end of the moving contact 2 through the clearance opening, isolating the electric arcs, high-temperature and high-pressure gases, and metal particles from the operating mechanism 9, and reducing the risk of the operating mechanism 9 jamming and failing. At the same time, it can further accelerate the entry of the electric arc into the arc extinguishing component 3, and extinguish the electric arc as quickly as possible.

[0133] It should be noted that, in the embodiments provided in this application, the barrier curtain 5 is required to have insulating and high-temperature resistant properties.

[0134] In one example, the barrier curtain 5 can be an elastic barrier curtain 5, that is, in this application, the barrier curtain 5 can be made of a material that is elastic, insulating and heat-resistant.

[0135] Thus, during the process of switching the barrier curtain 5 from the retracted state to the blocking state, the barrier curtain 5 itself has a buffering effect, reducing the possibility of damage to the barrier curtain 5 caused by pulling or tugging.

[0136] At the same time, when the curtain 5 is in the retracted state, the curtain 5 occupies less space and is easy to store.

[0137] In another example, the barrier curtain 5 includes multiple folded sections connected end-to-end. When the barrier curtain 5 is in the blocking state, the multiple folded sections are arranged sequentially along the direction from the base to the cover. At this time, the surface where the folded sections are located can be parallel to the direction from the base to the cover.

[0138] When the barrier curtain 5 is in the retracted state, multiple folding sections can be stacked together along the direction from the base to the cover. The surfaces of the folding sections can be perpendicular to the direction from the base to the cover. The barrier curtain 5 occupies a small space and is easy to store.

[0139] The material and structure of the barrier curtain 5 are not specified here; the specific details shall be subject to the actual situation.

[0140] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. A circuit breaker, characterized in that, include: A housing having a base and a cover; the base and the cover enclose a receiving cavity; The moving contact has a rotating end and a contact end that are arranged opposite to each other; the rotating end is rotatably disposed on the base. The moving contact has a contact position and a disengagement position relative to the base; when the moving contact is in the contact position, the moving contact is in contact with the stationary contact of the circuit breaker; when the moving contact is in the disengagement position, the moving contact is disengaged from the stationary contact. An arc-extinguishing assembly is disposed within the receiving cavity; a clearance opening is provided on the side of the arc-extinguishing assembly near the moving contact, and the contact end is disposed at the clearance opening; A barrier curtain is movably disposed at one end on the moving contact, and the other end of the barrier curtain is disposed on the base; The barrier curtain has a blocking state and a retracted state; when the moving contact is in the contact position, the barrier curtain is in the retracted state; when the moving contact is in the disengaged position, the barrier curtain is in the blocking state, and the barrier curtain corresponds to the clearance opening.

2. The circuit breaker according to claim 1, characterized in that, The circuit breaker further includes a first U-shaped link, which includes two opposing first links and second links; the first link is rotatably mounted on the moving contact; and the second link is connected to the barrier curtain.

3. The circuit breaker according to claim 2, characterized in that, The movable contact has a protrusion on the side near the blocking curtain; the protrusion is located between the contact end and the rotating end; when the blocking curtain is in the retracted state, the protrusion is used to block and limit the second connecting rod, so that the second connecting rod is located on the side of the protrusion away from the contact end.

4. The circuit breaker according to claim 1, characterized in that, The circuit breaker further includes a second U-shaped link, which includes two opposing third links and a fourth link; the third link is rotatably mounted on the base; and the fourth link is connected to the barrier curtain.

5. The circuit breaker according to claim 4, characterized in that, The base is provided with a connecting part, and the connecting part has a connecting hole, and the third connecting rod is rotatably disposed in the connecting hole.

6. The circuit breaker according to claim 5, characterized in that, The second U-shaped link also includes a fifth link, the two ends of which are respectively connected to one end of the third link and one end of the fourth link; A limiting groove is provided at one end of the connecting part near the cover; the limiting groove communicates with the connecting hole; the fifth connecting rod is rotatably disposed in the limiting groove; the limiting groove has a limiting wall on the side near the arc extinguishing component; the limiting wall is inclined towards the contact end along the direction from the base to the cover; when the blocking curtain is in the blocking state, the limiting wall is used to block and limit the fifth connecting rod.

7. The circuit breaker according to claim 5, characterized in that, The base is also provided with a storage groove, in which the barrier curtain is stored when it is in the retracted state; the storage groove is located on the side of the connecting part away from the contact end.

8. The circuit breaker according to claim 1, characterized in that, The circuit breaker further includes a baffle plate for dividing the housing cavity into a first cavity and a second cavity; the moving contact, the arc extinguishing assembly, and the blocking curtain are all located in the second cavity; The operating mechanism of the circuit breaker is disposed on the baffle, and the baffle has an opening, through which the driving end of the operating mechanism extends into the second receiving cavity.

9. The circuit breaker according to claim 8, characterized in that, The baffle has a mating surface on the side near the second receiving cavity. When the moving contact is in the disengaged position, the side of the moving contact near the cover is in contact with the mating surface.

10. The circuit breaker according to claim 1, characterized in that, The barrier curtain is an elastic barrier curtain; Alternatively, the blocking curtain includes multiple folded sections connected end to end. When the blocking curtain is in the blocking state, the multiple folded sections are arranged sequentially along the direction from the base to the cover. When the blocking curtain is in the retracted state, the multiple folded sections are stacked along the direction from the base to the cover.

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