A circuit breaker

Abstract

This utility model belongs to the field of circuit breaker technology and discloses a circuit breaker. The circuit breaker includes a main housing, within which are phase electrode housings, a tripping drive element, and a traction rod. An arc-extinguishing chamber is located within the phase electrode housing, and an air hole communicating with the arc-extinguishing chamber is opened on the phase electrode housing. The tripping drive element includes a drive rod, with its first end corresponding to the tripping part of the traction rod, and its second end having a drive groove facing and communicating with the air hole. The middle part of the drive rod is hinged to the phase electrode housing. Gas generated within the arc-extinguishing chamber is discharged through the air hole into the drive groove to drive the drive rod to rotate. The first end of the drive rod pushes against the tripping part to drive the traction rod to trip. The circuit breaker provided by this utility model achieves rapid tripping via pneumatic means, with high breaking efficiency, rapid response, and high force transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a circuit breaker. Background Technology

[0002] Circuit breakers are widely used in industry, agriculture, transportation, mining, construction and national defense. They have multiple protection functions such as overload, short circuit and undervoltage protection, adjustable operating value, high breaking capacity, and are convenient and safe. They are the most widely used products in low voltage electrical appliances.

[0003] In the existing technology, the tripping mechanism of circuit breakers is generally set to mechanical type, with many components. The tripping action has a certain delay, which cannot meet the requirements of rapid tripping and thus affects the breaking response efficiency of the circuit breaker in case of an accident. Utility Model Content

[0004] The purpose of this invention is to provide a circuit breaker that achieves rapid tripping via pneumatic means, with high breaking efficiency, rapid response, and high force transmission efficiency.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A circuit breaker, comprising:

[0007] The main housing includes a phase electrode housing, a tripping drive component, and a traction rod. The phase electrode housing includes an arc-extinguishing chamber, and the phase electrode housing has an air hole communicating with the arc-extinguishing chamber.

[0008] The tripping drive includes a drive rod, the first end of which is correspondingly disposed with the tripping part of the traction rod, the second end of which has a drive groove, the drive groove being covered on the air hole and communicating with the air hole, and the middle part of the drive rod being hinged to the phase electrode housing.

[0009] The gas generated in the arc-extinguishing chamber is discharged through the air hole into the drive groove to drive the drive rod to rotate. The first end of the drive rod pushes against the release part to drive the traction rod to release.

[0010] Preferably, the periphery of the air hole is provided with an arc-shaped sliding limiting part, and the driving groove is correspondingly provided with an arc-shaped sidewall. The sliding limiting part is located in the driving groove and slides on the arc-shaped sidewall.

[0011] Preferably, the sliding limiting part is provided on both sides of the air hole, and the two side walls of the driving groove are provided with arc-shaped side walls that correspond one-to-one with the sliding limiting part.

[0012] A sealing connection is provided on the side of the vent away from the drive rod. The two opposite ends of the sealing connection are connected to the sliding limiting part at the corresponding end. The sealing connection is used to seal the gap between the vent and the drive groove on the side away from the drive rod, so that the gas in the drive groove flows towards the side where the drive rod is located.

[0013] Preferably, the second end of the drive rod is provided with a fan-shaped drive head, the drive groove is formed on the fan-shaped drive head, and the arc-shaped sidewall and the fan-shaped drive head are concentrically arranged.

[0014] Preferably, the drive rod has a hinge hole in the middle, and the phase pole housing has a corresponding hinge shaft. The drive rod is sleeved on the hinge shaft through the hinge hole and is hinged to the hinge shaft.

[0015] Preferably, the tripping drive further includes an elastic reset member, which connects the phase electrode housing and the drive rod, and is used to drive the drive rod to reset.

[0016] Preferably, the elastic reset member includes a torsion spring, the phase pole housing is provided with a connecting shaft, and the torsion spring is sleeved on the connecting shaft.

[0017] Preferably, at least two phase pole housings are spaced apart within the main housing, the drive rod is disposed between two adjacent phase pole housings, and the torsion spring includes a sleeve portion, a helical portion disposed on opposite sides of the sleeve portion, and a locking portion disposed at the end of the helical portion; wherein...

[0018] The sleeve portion is sleeved on the first end of the drive rod, the spiral portion is sleeved on the connecting shaft of the corresponding side of the phase pole housing, and the locking portion abuts against the corresponding side of the phase pole housing.

[0019] Preferably, the phase electrode housing has a first slot, and the first end of the locking portion extends into and locks into the first slot.

[0020] Preferably, the drive rod has a hinge hole in the middle, the phase pole housing has a corresponding hinge shaft, the drive rod is sleeved on the hinge shaft through the hinge hole and hinged to the hinge shaft;

[0021] The elastic reset component includes a torsion spring, which is sleeved on the hinge shaft. The first end of the torsion spring abuts against the phase pole housing, and the second end of the torsion spring abuts against the drive rod.

[0022] Beneficial effects:

[0023] The circuit breaker provided by this utility model is equipped with a tripping drive component, which includes a drive rod. The middle part of the drive rod is hinged to the phase electrode housing. The first end of the drive rod is correspondingly arranged with the tripping part of the traction rod, and the second end of the drive rod is provided with a drive groove corresponding to the air hole. The drive groove is covered on the air hole and communicates with the air hole. When a fault occurs in the circuit connected to the circuit breaker, extremely high arc voltage and arc energy will occur, causing the internal metal material to evaporate, break down, and melt, forming a high temperature and strong arc. These reactions will cause oxygen in the air to decompose into nitrogen and oxygen. Among them, oxygen will react chemically with the metal on the surface of the material to produce gas and release energy. A large amount of gas generated in the arc-extinguishing chamber is discharged through the air hole and enters the drive groove, pushing the drive rod to rotate and push against the tripping part, thereby driving the traction rod to trip and complete the tripping operation. The above process realizes the tripping action of the circuit breaker quickly through pneumatic means. The structure is simple, the gas acts directly on the drive rod, and there is no need for external pistons or other components to transmit force, which effectively ensures the breaking efficiency, enables rapid tripping, and provides a rapid response. Attached Figure Description

[0024] Figure 1 This is a partial structural schematic diagram of the circuit breaker provided by this utility model;

[0025] Figure 2 This is a schematic diagram of the drive rod of the circuit breaker provided by this utility model;

[0026] Figure 3 This is a partial structural schematic diagram of the phase electrode housing of the circuit breaker provided by this utility model;

[0027] Figure 4 This is an exploded view of the circuit breaker traction rod and phase electrode housing provided by this utility model.

[0028] In the picture:

[0029] 1. Phase electrode housing; 101. Air vent; 11. Traction rod; 111. Tripping part; 12. Sliding limiting part; 13. Hinge shaft; 14. Connecting shaft; 15. First slot; 16. Sealing connection part;

[0030] 2. Tripping drive component; 21. Drive rod; 211. Fan-shaped drive head; 212. Drive groove; 2121. Arc-shaped side wall; 213. Hinge hole; 22. Torsion spring; 221. Sleeve part; 222. Spiral part; 223. Locking part. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] This embodiment provides a circuit breaker. (Refer to...) Figures 1 to 4 As shown, the circuit breaker includes a main housing (not shown), in which a phase electrode housing 1, a tripping drive 2, and a traction rod 11 are provided inside the main housing. The phase electrode housing 1 is provided with an arc-extinguishing chamber, and an air hole 101 communicating with the arc-extinguishing chamber is opened on the phase electrode housing 1. The tripping drive 2 includes a drive rod 21, the first end of which is correspondingly arranged with the tripping part 111 of the traction rod 11, and the second end of the drive rod 21 has a drive groove 212, which covers the air hole 101 and communicates with the air hole 101. The middle part of the drive rod 21 is hinged to the phase electrode housing 1. The gas generated in the arc-extinguishing chamber is discharged through the air hole 101 and enters the drive groove 212 to drive the drive rod 21 to rotate. The first end of the drive rod 21 pushes against the tripping part 111 to drive the traction rod 11 to trip.

[0036] In this embodiment, when a fault occurs in the circuit connected to the circuit breaker, extremely high arc voltage and arc energy occur, causing the internal metal material to evaporate, break down, and melt, forming a high temperature and strong arc. These reactions decompose oxygen in the air into nitrogen and oxygen, where the oxygen reacts chemically with the metal on the material surface, producing gas and releasing energy. A large amount of gas generated in the arc-extinguishing chamber is discharged through the vent 101 and enters the drive groove 212, pushing the drive rod 21 to rotate and push against the tripping part 111, thereby driving the traction rod 11 to trip, completing the tripping operation. The above process quickly achieves the tripping action of the circuit breaker through pneumatic means. The structure is simple; the gas acts directly on the drive rod 21, eliminating the need for external pistons or other components to transmit force, effectively ensuring breaking efficiency, achieving rapid tripping, and providing a quick response.

[0037] For example, the operating mechanism of the circuit breaker includes a traction rod 11, a base frame, a trip latch, a locking latch, a moving contact, and a stationary contact. The base frame is fixed within the phase housing 1. The trip latch and the locking latch are hinged to the base frame. The locking latch has a clearance groove, and a corresponding abutment portion is provided on the tripping part 111. A reset member (not shown) is provided between the locking latch and the base frame. The reset member ensures that the locking latch always tends to swing towards the tripping part 111. When the drive rod 21 moves and pushes against the tripping part 111, the traction rod 11 swings as a whole. Under the force of the reset member, the locking latch always tends to swing towards the tripping part 111. During this process, the abutment portion can enter the clearance hole, and the locking latch swings and disengages from the trip latch, thus switching the traction rod 11 from the re-clamping position to the tripping position. At this time, the circuit breaker is in the tripped state, the trip latch is unlocked and in a free state, and the moving contact and stationary contact are separated. When an external force drives the trip latch to swing, the trip latch causes the locking latch to swing in the opposite direction. During this process, the abutment part moves out of the clearance hole, and the entire traction rod 11 swings in the opposite direction, so that the abutment part abuts against the surface of the locking latch after moving out of the clearance hole. This achieves the switching of the traction rod 11 from the tripped position to the re-clamped position. At this time, the circuit breaker is in the re-clamped state, and the trip latch and the locking latch engage with each other to lock the trip latch. The circuit breaker can then perform normal closing and opening operations.

[0038] In this embodiment, the vent 101 has an arc-shaped sliding limiting part 12 around its periphery, and the drive groove 212 is correspondingly provided with an arc-shaped sidewall 2121. The sliding limiting part 12 is located within the drive groove 212 and slides against the arc-shaped sidewall 2121. Specifically, the hinge center between the drive rod 21 and the phase electrode housing 1, the sliding limiting part 12, and the arc-shaped sidewall 2121 are concentrically arranged. When gas enters the drive groove 212 and drives the drive rod 21 to rotate, the sliding limiting part 12 remains relatively slidable within the drive groove 212 and against the arc-shaped sidewall 2121. The sliding engagement between the sliding limiting part 12 and the arc-shaped sidewall 2121 provides strict guidance for the swing of the drive rod 21, ensuring accurate movement of the drive rod 21; and limits the swing of the drive rod 21, ensuring that the swing of the limiting rod is within an appropriate range.

[0039] In this embodiment, the sliding limiting part 12 is integrally formed with the phase electrode housing 1.

[0040] In this embodiment, sliding limiting portions 12 are provided on both opposite sides of the vent 101, and arc-shaped sidewalls 2121 corresponding to the sliding limiting portions 12 are provided on both opposite sidewalls of the drive groove 212. A sealing connection portion 16 is provided on the side of the vent 101 away from the drive rod 2. The two opposite ends of the sealing connection portion 16 are connected to the corresponding sliding limiting portions 12. The sealing connection portion 16 is used to seal the gap between the vent 101 and the drive groove 212 on the side away from the drive rod 21, so that the gas in the drive groove 212 flows towards the side where the drive rod 21 is located. See details. Figure 1 As shown, the sealing connection 16 connects between the two sliding limiting parts 12, forming a U-shaped flow guiding structure. The sealing connection 16 seals the gap between the air hole 101 and the drive groove 212 on the side opposite to the drive rod 21, that is, the opening of the U-shaped flow guiding structure faces the side where the drive rod 21 is located, so that the gas in the drive groove 212 flows towards the side where the drive rod 21 is located. Figure 1 The flow is directed in the direction of the middle arrow, ensuring effective pushing of the drive rod 21.

[0041] Furthermore, a sector-shaped drive head 211 is provided at the second end of the drive rod 21, and a drive groove 212 is formed on the sector-shaped drive head 211, with the arc-shaped sidewall 2121 and the sector-shaped drive head 211 being concentrically positioned. The sector-shaped drive head 211 provides sufficient space for the drive groove 212, and the concentric positioning of the sector-shaped drive head 211 and the arc-shaped sidewall 2121 facilitates manufacturing and installation positioning.

[0042] In this embodiment, the fan-shaped drive head 211 and the drive rod 21 are integrally formed. Since the structure of the fan-shaped drive head 211 and the drive rod 21 is relatively simple, the integral forming setting allows for fast and efficient production, avoids the process of assembling parts separately, and eliminates the need for connecting parts such as screws and bolts, thereby improving production efficiency and reducing costs.

[0043] Specifically, a hinge hole 213 is provided in the middle of the drive rod 21, and a corresponding hinge shaft 13 is provided in the phase pole housing 1. The drive rod 21 is sleeved on the hinge shaft 13 through the hinge hole 213 and is hinged to the hinge shaft 13. Specifically, the axis, sliding limit part 12, and arc-shaped side wall 2121 of the hinge shaft 13 are arranged concentrically. Along the radial direction of the hinge shaft 13, arc-shaped sliding limit parts 12 are provided on both sides opposite to the air hole 101, and the opposite side walls of the drive groove 212 are also correspondingly set as arc-shaped side walls 2121.

[0044] Furthermore, the tripping drive 2 also includes an elastic reset member, which connects the phase housing 1 and the drive rod 21. The elastic reset member is used to drive the drive rod 21 to reset. The elastic reset member provides a force that forces the first end of the drive rod 21 away from the tripping part 111, so that when the air blowing action is released, the drive rod 21 can be reset only under the action of the elastic reset member.

[0045] In some alternative implementations, refer to Figure 4 As shown, at least two phase pole housings 1 are spaced apart inside the main housing. A drive rod 21 is disposed between two adjacent phase pole housings 1. The torsion spring 22 includes a sleeve portion 221, a helical portion 222 disposed on opposite sides of the sleeve portion 221, and a locking portion 223 disposed at the end of the helical portion 222. The sleeve portion 221 is sleeved on the first end of the drive rod 21, the helical portion 222 is sleeved on the connecting shaft 14 of the corresponding phase pole housing 1, and the locking portion 223 abuts against the corresponding phase pole housing 1. Specifically, a tripping drive element 2 is provided between each pair of adjacent phase pole housings 1, i.e., each pair includes a drive rod 21 and a torsion spring 22. The torsion spring 22 specifically includes a sleeve portion 221, a helical portion 222, and a retaining portion 223. The helical portion 222 is sleeved on the connecting shaft 14 of the corresponding phase pole housing 1, ensuring reliable and stable installation of the torsion spring 22. The retaining portion 223 abuts against the corresponding phase pole housing 1, facilitating the uniform and reliable generation of elastic force by the torsion spring 22 during deformation. When the drive rod 21 swings, the torsion spring 22 deforms and generates elastic force, which is used to drive the drive rod 21 to quickly and effectively reset when the air blowing action is released.

[0046] Optionally, the socket 221 is configured as a U-shaped socket groove, which is fitted onto the first end of the drive rod 21. In other optional embodiments, the socket 221 may also be configured as a through hole, with the first end of the drive rod 21 passing through the through hole.

[0047] Specifically, the phase electrode housing 1 has a first slot 15, and the first end of the locking part 223 extends into and locks into the first slot 15. By setting the first slot 15, the end of the torsion spring 22, i.e. the locking part 223, extends into the corresponding first slot 15, thereby making the torsion spring 22, the phase electrode housing 1, and the drive rod 21 form a reliable force transmission point, which facilitates the effective transmission of elastic force and thus realizes the reset drive of the drive rod 21.

[0048] In some alternative embodiments, the torsion spring 22 is directly sleeved on the hinge shaft 13, with the first end of the torsion spring 22 abutting against the phase pole housing 1 and the second end of the torsion spring 22 abutting against the drive rod 21. With this configuration, if the axial space of the hinge shaft 13 allows, the torsion spring 22 can be integrated and installed on the hinge shaft 13, avoiding the need for a connecting shaft 14, further improving the integration of the components, while still achieving the effect of driving the drive rod 21 to reset.

[0049] Specifically, the drive rod 21 has a second slot, and the second end of the torsion spring 22 extends into and abuts against the second slot. Specifically, the first end and the second end of the torsion spring 22 abut against the first slot 15 and the second slot respectively, that is, the two opposite ends of the torsion spring 22 form reliable force transmission points with the phase pole housing 1 and the drive rod 21 respectively, which facilitates the effective transmission of elastic force, thereby realizing the reset drive of the drive rod 21.

[0050] Specifically, the first end of the drive rod 21 is set in an arc shape. With this configuration, the angle between the first end of the drive rod 21 and the release part 111 will change during the swinging process of the drive rod 21. Setting the first end of the drive rod 21 in an arc shape can maintain effective contact between the first end of the drive rod 21 and the release part 111 at all times during the angle change, ensuring the reliability and effectiveness of the pushing action.

[0051] In summary, the circuit breaker provided in this embodiment, by setting a drive rod 21, quickly realizes the tripping action of the circuit breaker through pneumatic means. It has a simple structure, and the gas acts directly on the drive rod 21 without the need for external pistons or other components to transmit force, effectively ensuring breaking efficiency, achieving rapid tripping, and responding quickly.

[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 circuit breaker, characterized in that, include: The main housing contains a phase electrode housing (1), a tripping drive (2), and a traction rod (11). The phase electrode housing (1) contains an arc-extinguishing chamber. The phase electrode housing (1) has an air hole (101) communicating with the arc-extinguishing chamber. The tripping drive (2) includes a drive rod (21), the first end of which is correspondingly disposed with the tripping part (111) of the traction rod (11), the second end of which has a drive groove (212), the drive groove (212) covering the air hole (101) and communicating with the air hole (101), and the middle part of the drive rod (21) is hinged to the phase electrode housing (1); The gas generated in the arc-extinguishing chamber is discharged through the air hole (101) and enters the drive groove (212) to drive the drive rod (21) to rotate. The first end of the drive rod (21) pushes against the release part (111) to drive the traction rod (11) to release.

2. The circuit breaker according to claim 1, characterized in that, The vent (101) has an arc-shaped sliding limit part (12) around its periphery, and the drive groove (212) is provided with an arc-shaped sidewall (2121). The sliding limit part (12) is located in the drive groove (212) and slides on the arc-shaped sidewall (2121).

3. The circuit breaker according to claim 2, characterized in that, The air hole (101) is provided with the sliding limiting part (12) on both sides opposite to each other, and the driving groove (212) is provided with the arc-shaped side wall (2121) corresponding to the sliding limiting part (12) on both sides opposite to each other. The vent (101) is provided with a sealing connection part (16) on the side away from the drive rod (21). The two ends of the sealing connection part (16) are connected to the sliding limit part (12) at the corresponding ends. The sealing connection part (16) is used to seal the gap between the vent (101) and the drive groove (212) on the side away from the drive rod (21), so that the gas in the drive groove (212) flows towards the side where the drive rod (21) is located.

4. The circuit breaker according to claim 3, characterized in that, The second end of the drive rod (21) is provided with a fan-shaped drive head (211), the drive groove (212) is opened on the fan-shaped drive head (211), and the arc-shaped sidewall (2121) and the fan-shaped drive head (211) are arranged at the same center.

5. The circuit breaker according to claim 1, characterized in that, The drive rod (21) has a hinge hole (213) in the middle, and the phase pole housing (1) has a corresponding hinge shaft (13). The drive rod (21) is sleeved on the hinge shaft (13) through the hinge hole (213) and is hinged to the hinge shaft (13).

6. The circuit breaker according to claim 1, characterized in that, The tripping drive (2) also includes an elastic reset member, which connects the phase electrode housing (1) and the drive rod (21) and is used to drive the drive rod (21) to reset.

7. The circuit breaker according to claim 6, characterized in that, The elastic reset component includes a torsion spring (22), and the phase pole housing (1) is provided with a connecting shaft (14), with the torsion spring sleeved on the connecting shaft (14).

8. The circuit breaker according to claim 7, characterized in that, At least two phase pole housings (1) are spaced apart inside the main housing. The drive rod (21) is located between two adjacent phase pole housings (1). The torsion spring (22) includes a sleeve portion (221), a helical portion (222) located on opposite sides of the sleeve portion (221), and a locking portion (223) located at the end of the helical portion (222). The sleeve part (221) is sleeved on the first end of the drive rod (21), the spiral part (222) is sleeved on the connecting shaft (14) of the corresponding side of the phase pole housing (1), and the locking part (223) abuts against the corresponding side of the phase pole housing (1).

9. The circuit breaker according to claim 8, characterized in that, The phase electrode housing (1) has a first slot (15), and the first end of the locking part (223) extends into and locks into the first slot (15).

10. The circuit breaker according to claim 6, characterized in that, The drive rod (21) has a hinge hole (213) in the middle, and the phase pole housing (1) has a corresponding hinge shaft (13). The drive rod (21) is sleeved on the hinge shaft (13) through the hinge hole (213) and is hinged to the hinge shaft (13). The elastic reset component includes a torsion spring (22), which is sleeved on the hinge shaft (13). The first end of the torsion spring abuts against the phase pole housing (1), and the second end of the torsion spring abuts against the drive rod (21).

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