Circuit breaker opening and tripping device and high-voltage switch cabinet

Abstract

The application belongs to the technical field of high-voltage switch cabinets, and discloses a circuit breaker opening and tripping device and a high-voltage switch cabinet, which is used for controlling the on-off of the power-off circuit of the circuit breaker, and comprises a base, a switch assembly and a resistance assembly; wherein the switch assembly and the resistance assembly are connected in series in the power-off circuit, the switch assembly has a disconnected position and a connected position, and the resistance assembly has a maximum resistance value position and a working resistance value position; when the resistance assembly is located at the working resistance value position, the switch assembly is in the connected position to connect the power-off circuit; when the resistance assembly is located at the maximum resistance value position, the switch assembly is in the disconnected position to disconnect the power-off circuit. The circuit breaker opening and tripping device can prevent high-voltage arc from being generated in the circuit breaker, thereby protecting the safety of maintenance personnel and ensuring the high safety of the high-voltage switch cabinet.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear technology, and in particular to a circuit breaker tripping device and a high-voltage switchgear. Background Technology

[0002] In high-voltage switchgear, circuit breakers are usually operated remotely. However, when a circuit breaker fails to open (a typical fault in high-voltage switchgear, where the monitoring system cannot control the circuit breaker to open normally), the circuit breaker's power-off circuit cannot be disconnected remotely. Therefore, maintenance personnel need to operate the circuit breaker at close range to disconnect its power-off circuit.

[0003] However, during the process of manually disconnecting the power circuit, high-voltage arcs are easily generated inside the circuit breaker. These arcs can easily cause fires inside the entire high-voltage switchgear. Furthermore, after a fire, it poses a potential danger to the subsequent maintenance process, resulting in higher costs and lower safety for the entire high-voltage switchgear. Summary of the Invention

[0004] The purpose of this invention is to provide a circuit breaker tripping device and a high-voltage switchgear, which ensures that high-voltage arcs are not easily generated inside the circuit breaker, thus preventing fires inside the high-voltage switchgear; and avoids potential dangers to subsequent maintenance personnel during the maintenance process, ensuring that the cost of the entire high-voltage switchgear is low and the safety is high.

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

[0006] The circuit breaker tripping device includes:

[0007] Base;

[0008] A switch assembly is disposed on the base and is connected in series in the power-off circuit of the circuit breaker. The switch assembly has an open position and an open position.

[0009] A resistor assembly is disposed on the base and connected in series in the power-off circuit. The resistor assembly can adjust its resistance value connected in the power-off circuit and has a maximum resistance value position and a working resistance value position.

[0010] Specifically, when the resistor component is located at the maximum resistance value position, the switch component is in the open position to disconnect the power-off circuit; when the resistor component is located at the working resistance value position, the switch component is in the connected position to connect the power-off circuit.

[0011] Preferably, the resistor assembly includes:

[0012] A sliding rheostat is installed on the base and connected in series in the power-off circuit. The resistance value of the sliding rheostat connected in the power-off circuit is adjustable.

[0013] Preferably, the circuit breaker tripping device further includes:

[0014] A linkage component, wherein the linkage component is respectively connected to the switch component and the resistor component in a driving manner;

[0015] A drive component is disposed on the base, and the drive component is drivenly connected to the linkage component.

[0016] Preferably, the linkage component includes:

[0017] A drive gear, wherein the drive assembly is capable of driving the drive gear to rotate;

[0018] The guide member, wherein the resistor assembly is used for fixed connection with the guide member;

[0019] A deflector is provided, one end of which is coaxially connected to the drive gear, and the other end of which can slide within the guide member to drive the guide member to move along a first direction to adjust the resistance value of the resistor assembly connected to the power-off circuit. The first direction is parallel to the length direction of the base.

[0020] Preferably, the deflector includes:

[0021] A deflection rod, one end of which is coaxially connected to the drive gear, and the length of the deflection rod extends along a first direction;

[0022] A protruding post is provided at the other end of the deflection rod. The protruding post can slide within the guide member and can drive the guide member to move along a first direction.

[0023] Preferably, the guide member is provided with a first sliding groove and a second sliding groove that are connected. The first sliding groove is arranged in a straight line and extends along a first direction, and the second sliding groove is arranged in an arc shape. The protrusion can slide in the first sliding groove and the second sliding groove.

[0024] Specifically, when the drive gear drives the protrusion to slide to the junction position between the first sliding groove and the second sliding groove, the resistor component is located at the position of the maximum resistance value.

[0025] Preferably, the linkage component further includes:

[0026] A synchronous shaft, coaxial with its two ends fixedly connected to the drive gear and the deflection rod, respectively;

[0027] A timing belt, one end of which is fitted onto the timing shaft;

[0028] A sleeve, the other end of the timing belt is sleeved on the sleeve, and a trigger element is protruding from the inner wall surface of the sleeve;

[0029] A rotating component is used to be fixedly connected to the switch assembly. The outer peripheral surface of the rotating component is recessed with a notch. The sleeve is sleeved on the rotating component, and the trigger is slidably disposed in the notch. The synchronous belt can drive the sleeve to rotate relative to the rotating component. When the trigger abuts against the groove wall of the notch, the rotating component rotates, so as to drive the switch assembly to switch between the disconnected position and the connected position.

[0030] Preferably, the driving component includes:

[0031] A slider is slidably disposed on the base along a first direction. The slider includes a first inclined surface and a second inclined surface connected to each other. Both the first inclined surface and the second inclined surface are inclined upward toward the center of the slider.

[0032] A rack extends along a first direction, the rack is fixedly installed to the sliding member, and the rack is connected to the linkage assembly in a driving manner;

[0033] A plug-in rod extends along a second direction, which is perpendicular to the first direction. One end of the plug-in rod slides against the first inclined surface or the second inclined surface, and the other end passes through the support member, which is fixedly installed.

[0034] An elastic element is sleeved on the plug rod, and the two ends of the elastic element abut against the plug rod and the bearing member, respectively;

[0035] When the slider is pushed to slide along the first direction and toward the switch assembly, the plug rod slides along the first inclined surface to compress the elastic element in the second direction; when the plug rod slides to the top of the connection between the first inclined surface and the second inclined surface, the slider can slide along the first direction and toward the switch assembly under the elastic force of the elastic element.

[0036] Preferably, the slider further includes a first locking groove and a second locking groove. The first locking groove is disposed between one inner wall surface of the slider and the first inclined surface, and the second locking groove is disposed between the other inner wall surface of the slider and the second inclined surface. When the plug rod is located in the first locking groove or the second locking groove, it can restrict the movement position of the slider in the first direction.

[0037] A high-voltage switchgear includes a circuit breaker, a cabinet, a power-off circuit, and the aforementioned circuit breaker tripping device. The circuit breaker, the circuit breaker tripping device, and the power-off circuit are respectively installed inside the cabinet. The circuit breaker is connected in series in the power-off circuit, and the circuit breaker tripping device is used to connect or disconnect the power-off circuit.

[0038] The beneficial effects of this invention are:

[0039] This invention provides a circuit breaker tripping device for controlling the opening and closing of the circuit breaker's power-off circuit. The device includes a base, a switch assembly, and a resistor assembly. The switch assembly and resistor assembly are connected in series in the power-off circuit. The switch assembly has an open position and an open position, while the resistor assembly has a maximum resistance value position and a working resistance value position. When the resistor assembly is in the working resistance value position, the switch assembly is in the open position to connect the power-off circuit, ensuring the normal operation of the circuit breaker. When the resistor assembly is in the maximum resistance value position, the switch assembly is in the open position to disconnect the power-off circuit, achieving effective control of the circuit breaker's power-off circuit. This allows for timely disconnection of the circuit breaker's power-off circuit, preventing further escalation of the fault. Because the resistance in the power-off circuit is at its maximum when disconnected, the current is also at its minimum, ensuring that a high-voltage arc is unlikely to be generated inside the circuit breaker during the disconnection process. This effectively prevents fires inside the high-voltage switchgear and avoids potential dangers to subsequent maintenance personnel, thus ensuring a high level of safety for the entire high-voltage switchgear. Attached Figure Description

[0040] Figure 1 This is a diagram showing the arrangement of the circuit breaker tripping device in a high-voltage switchgear according to an embodiment of the present invention.

[0041] Figure 2 This is a first schematic diagram of the circuit breaker tripping device provided in an embodiment of the present invention;

[0042] Figure 3 This is a second schematic diagram of the circuit breaker tripping device provided in an embodiment of the present invention;

[0043] Figure 4 This is a third schematic diagram of the circuit breaker tripping device provided in an embodiment of the present invention;

[0044] Figure 5 This is a fourth schematic diagram of the circuit breaker tripping device provided in an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the switching assembly and linkage assembly of the circuit breaker tripping device provided in an embodiment of the present invention;

[0046] Figure 7 This is a first schematic diagram of the switching assembly of the circuit breaker tripping device provided in an embodiment of the present invention;

[0047] Figure 8 This is a second schematic diagram of the switching assembly of the circuit breaker tripping device provided in an embodiment of the present invention;

[0048] Figure 9 This is a schematic diagram of the sleeve of the circuit breaker tripping device provided in an embodiment of the present invention;

[0049] Figure 10 This is a schematic diagram of the plug-in rod of the circuit breaker tripping device provided in an embodiment of the present invention.

[0050] Figure 11 This is a schematic diagram of the slider of the circuit breaker tripping device provided in an embodiment of the present invention;

[0051] Figure 12 A schematic diagram of a high-voltage switchgear provided in an embodiment of the present invention.

[0052] In the picture:

[0053] 10. Cabinet;

[0054] 1. Base;

[0055] 2. Switch assembly; 21. Mounting base; 211. Stationary contact; 22. Movable conductive rod;

[0056] 3. Resistor assembly; 31. First conductive element; 32. Second conductive element; 33. Sliding rheostat; 331. Resistor element; 332. Sliding electrode;

[0057] 4. Drive assembly; 41. Manual lever; 42. Sliding component; 421. First inclined surface; 422. Second inclined surface; 423. First locking groove; 424. Second locking groove; 43. Connecting rod; 431. Main body; 432. Roller; 44. Elastic component; 45. Rack; 46. Bearing component; 461. Through hole; 47. Limiting block;

[0058] 5. Linkage assembly; 51. Drive gear; 52. Guide component; 521. First sliding groove; 522. Second sliding groove; 53. Synchronous belt; 54. Sleeve; 541. Trigger; 55. Rotating component; 551. Notch; 56. Bracket; 57. Deflector; 571. Protruding post; 572. Deflector rod;

[0059] 6. Protective casing. Detailed Implementation

[0060] 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 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, and not all of the structures.

[0061] In the description of this invention, 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 invention based on the specific circumstances.

[0062] 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.

[0063] In the description of this embodiment, the terms "upper," "lower," "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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0064] like Figures 1-2 As shown, this invention provides a circuit breaker tripping device and a high-voltage switchgear. The high-voltage switchgear includes a circuit breaker, a cabinet 10, a power-off circuit, and the circuit breaker tripping device. The circuit breaker, the circuit breaker tripping device, and the power-off circuit are respectively installed inside the cabinet 10. The circuit breaker is connected in series in the power-off circuit, and the circuit breaker tripping device is used to connect or disconnect the power-off circuit. In this embodiment, the circuit breaker, cabinet 10, and power-off circuit are all common structures in existing high-voltage switchgear; therefore, the specific working principle will not be described in detail here.

[0065] Specifically, the circuit breaker tripping device includes a base 1, a switch assembly 2, and a resistor assembly 3. Both the switch assembly 2 and the resistor assembly 3 are mounted on the base 1. The switch assembly 2 is connected in series in the circuit breaker's disconnection circuit and has an open position and an open position. The resistor assembly 3 is connected in series in the disconnection circuit and can adjust its resistance value connected to the disconnection circuit. The resistor assembly 3 has a maximum resistance value position and a working resistance value position. When the resistor assembly 3 is at the maximum resistance value position, the switch assembly 2 is in the open position to disconnect the disconnection circuit; when the resistor assembly 3 is at the working resistance value position, the switch assembly 2 is in the open position to connect the disconnection circuit.

[0066] Compared to existing technologies, the circuit breaker tripping device in this embodiment changes the disconnection time of the circuit breaker when a failure to trip occurs. By connecting a switch assembly 2 and a resistor assembly 3 in series in the circuit breaker's power-off circuit, the switch assembly 2 has an open position and an open position, and the resistor assembly 3 has an adjustable resistance with a maximum resistance position and a working resistance position. When the resistor assembly 3 is in the maximum resistance position, the switch assembly 2 is in the open position to disconnect the power-off circuit, thereby promptly cutting off the circuit breaker's connection in the power-off circuit and preventing further escalation of the fault. Since the resistance value in the power-off circuit is at its maximum when the power-off circuit is disconnected, the current value in the power-off circuit is at its minimum, ensuring that the current value is below the safe current level. This prevents the generation of high-voltage arcs inside the circuit breaker, effectively avoiding fires within the entire high-voltage switchgear. Simultaneously, the circuit breaker tripping device ensures that it does not pose a potential danger to subsequent maintenance personnel, thus guaranteeing a high level of safety for the entire high-voltage switchgear.

[0067] Optionally, such as Figure 2 As shown, in this embodiment, the switch assembly 2 includes a fixed base 21 and a movable conductive rod 22; wherein, the fixed base 21 is fixedly installed on the base 1, the fixed base 21 is connected in series with the resistor assembly 3, a stationary contact 211 is electrically connected to the fixed base 21, one end of the movable conductive rod 22 is hinged to the fixed base 21, and the other end of the movable conductive rod 22 can rotate to engage with the stationary contact 211.

[0068] Specifically, when the other end of the movable conductive rod 22 is engaged with the stationary contact 211, the switch assembly 2 is in the connected position; when the other end of the movable conductive rod 22 is disengaged from the stationary contact 211, the switch assembly 2 is in the disconnected position. This configuration simplifies the structure and operation of the switch assembly 2, making it easy to observe the continuity of the power-off circuit. Here, the specific structure of the switch assembly 2 is not limited, as long as it enables the switching of the power-off circuit.

[0069] Optionally, such as Figures 1-3As shown, in this embodiment, the resistor assembly 3 includes a sliding rheostat 33, which is mounted on the base 1 and connected in series in the power-off circuit. The resistance value of the sliding rheostat 33 connected in the power-off circuit is adjustable. By changing the resistance value of the sliding rheostat 33 connected in the power-off circuit, the magnitude of the current in the power-off circuit can be directly affected. When the resistance value of the sliding rheostat 33 connected in the power-off circuit is at its maximum, the resistor assembly 3 is at its maximum resistance value position, that is, at this time the current value in the power-off circuit is minimum and below the safe current.

[0070] By setting up the sliding rheostat 33, the resistance value of the resistor assembly 3 is adjusted more simply and conveniently. The resistance value connected to the power-off circuit can be precisely controlled by adjusting the resistance value of the sliding rheostat 33, which greatly reduces the possible errors in the adjustment process. At the same time, the sliding rheostat 33 has good high temperature resistance, which can prevent the sliding rheostat 33 from being damaged by excessive current and heat in the power-off circuit.

[0071] Specifically, such as Figure 2 and Figure 3 As shown, the first direction is parallel to the length direction of the base 1. In this embodiment, the sliding rheostat 33 includes a resistive element 331 and a sliding electrode 332. The sliding electrode 332 is slidably disposed on the resistive element 331 along the first direction. The sliding electrode 332 is electrically connected to the resistive element 331. Moving the position of the sliding electrode 332 on the resistive element 331 can adjust the resistance value of the sliding rheostat 33 connected to the power-off circuit. In this embodiment, as... Figure 2 As shown, when the sliding electrode 332 is located at the rightmost end of the resistor 331, the sliding rheostat 33 is located at the position of maximum resistance value.

[0072] Optionally, such as Figure 2 As shown, in this embodiment, the resistor assembly 3 further includes a first conductive element 31 and a second conductive element 32. The first conductive element 31 is electrically connected to the first end of the fixed base 21 and is connected to the power-off circuit. The second conductive element 32 is electrically connected to the first end of the sliding rheostat 33 and is connected to the power-off circuit. The second end of the fixed base 21 and the second end of the sliding rheostat 33 are connected in series by a wire.

[0073] The arrangement of the first conductive element 31 and the second conductive element 32 makes the connection between the switch assembly 2 and the resistor assembly 3 and the power-off circuit more stable and reliable, avoiding problems such as current interruption caused by loose connection, and providing a favorable guarantee for the subsequent tripping operation. The sliding rheostat 33 in this embodiment is prior art, and how to realize the electrical connection between the sliding rheostat 33 and other components, and how to realize the regulation and flow of current inside the sliding rheostat 33, will not be described in detail.

[0074] Optionally, such as Figure 1 and Figure 4 As shown, in this embodiment, the circuit breaker tripping device further includes a protective shell 6, which is disposed on the base 1. The length of the protective shell 6 extends along a first direction, and the protective shell 6 covers the switch assembly 2 and the resistor assembly 3. The above arrangement greatly ensures that the switch assembly 2 and the resistor assembly 3 operate normally in a relatively stable and safe environment, ensuring the reliability and stability of the entire circuit breaker tripping device.

[0075] Furthermore, such as Figures 2-5 As shown, the circuit breaker tripping device also includes a linkage component 5 and a drive component 4. The linkage component 5 is connected to the switch component 2 and the resistor component 3 respectively. The drive component 4 is located on the base 1 and is connected to the linkage component 5 in a driving manner.

[0076] When the drive component 4 is activated, it transmits power to the linkage component 5, causing the linkage component 5 to move along a predetermined path, thereby driving the connected switch component 2 and resistor component 3 to work together. This configuration prevents the switch component 2 from disconnecting the power-off circuit when the resistor component 3 is not at its maximum resistance value position; it also prevents the switch component 2 from remaining in the connected position when the resistor component 3 is at its maximum resistance value position, thus reducing the fault tolerance rate of the circuit breaker tripping device and simplifying the process. It should be noted that in this embodiment, the linkage component 5 is connected to the movable conductive rod 22 in the switch component 2 and the sliding electrode 332 in the resistor component 3.

[0077] Furthermore, such as Figures 2-5 As shown, the linkage component 5 includes a drive gear 51, a guide member 52, and a deflector 57. The drive component 4 drives the drive gear 51 to rotate. The sliding electrode 332 of the resistor component 3 is fixedly connected to the guide member 52. One end of the deflector 57 is coaxially connected to the drive gear 51, and the other end of the deflector 57 can slide within the guide member 52. This allows the guide member 52 to move along a first direction via the deflector rod 572, thereby adjusting the resistance value of the resistor 331 connected to the power-off circuit. This configuration converts the rotation of the drive gear 51 into linear sliding of the guide member 52 along the first direction, thereby adjusting the resistance value of the resistor 331 connected to the power-off circuit. This achieves precise current control of the power-off circuit, ensuring stable operation of the power-off circuit and normal tripping action of the circuit breaker. Furthermore, the drive component 4 has a simple structure and is easy to operate. Optionally, in this embodiment, the linkage component 5 is fitted to the protective shell 6 to ensure the accuracy of the linkage component 5's movement. Specifically, the guide member 52 is fitted to the protective shell 6.

[0078] Optionally, such as Figures 2-5As shown, in this embodiment, the linkage component 5 further includes a bracket 56, which is fixed on the base 1, and the drive gear 51 is rotatably connected to the bracket 56. This arrangement provides support for the drive gear 51, avoiding problems such as jamming and malfunctions that may occur due to unstable support of the drive gear 51, thus improving the reliability and stability of the linkage component 5.

[0079] Optionally, such as Figures 2-5 As shown, the deflecting component 57 includes a protrusion 571 and a deflecting rod 572. One end of the deflecting rod 572 is coaxially connected to the drive gear 51, and the length of the deflecting rod 572 extends along a first direction. The protrusion 571 protrudes from the other end of the deflecting rod 572 and can slide within the guide member 52, driving the guide member 52 to move along the first direction. When the drive gear 51 rotates, the rotational motion is transmitted to the protrusion 571 through the deflecting rod 572, allowing the protrusion 571 to slide linearly within the guide member 52. This converts the rotational motion of the drive gear 51 into linear sliding of the guide member 52 along the first direction, thereby ensuring the accuracy and stability of the movement of the linkage component 5. Simultaneously, the resistance value of the sliding rheostat 33 connected to the power-off circuit is adjusted.

[0080] Furthermore, such as Figure 2 As shown, the guide member 52 is provided with a first sliding groove 521 and a second sliding groove 522 that are connected. The first sliding groove 521 is straight and extends along a first direction, while the second sliding groove 522 is arc-shaped. The protrusion 571 can slide within the first sliding groove 521 and the second sliding groove 522. When the drive gear 51 drives the protrusion 571 to slide to the junction between the first sliding groove 521 and the second sliding groove 522, the sliding electrode 332 moves in the opposite direction of the first direction to the rightmost end of the resistor 331, and the resistor assembly 3 is located at the position of maximum resistance value. The above configuration provides a stable and directional trajectory for the sliding of the protrusion 571, and at the same time achieves precise positioning of the position of maximum resistance value. In other embodiments, the second sliding groove 522 may not be provided, as long as it can be ensured that when the protrusion 571 moves to the leftmost side of the first sliding groove 521, the sliding rheostat 33 is located at the position of maximum resistance value.

[0081] Optionally, such as Figure 2 As shown, in this embodiment, the length of the first sliding groove 521 is the same as the distance between the working resistance value position and the maximum resistance value position of the resistor assembly 3, so as to ensure that when the protrusion 571 slides to the junction position of the first sliding groove 521 and the second sliding groove 522, the sliding rheostat 33 is just located at the maximum resistance value position, thus ensuring the consistency of the operation of the guide 52 and the sliding rheostat 33.

[0082] Optionally, such as Figures 2-5As shown, in this embodiment, the radius of the second sliding groove 522, the length of the deflection rod 572, and the distance between the axis of the protrusion 571 and the axis of the drive gear 51 are equal. When the drive gear 51 drives the protrusion 571 past the junction of the first sliding groove 521 and the second sliding groove 522 and continues to slide within the second sliding groove 522, the position of the guide member 52 remains unchanged because the sliding trajectory of the protrusion 571 is the same as the arc shape of the second sliding groove 522. That is, the sliding rheostat 33 can be kept at the position of maximum resistance value. The above settings further ensure the accuracy of the position of maximum resistance value, providing a basis for the switch assembly 2 to disconnect the circuit breaker without generating a high-voltage arc.

[0083] Furthermore, such as Figure 4 and Figures 6-9 As shown, the linkage assembly 5 also includes a synchronous shaft, a synchronous belt 53, a sleeve 54, and a rotating component 55. The synchronous shaft is coaxial with the drive gear 51, and the two ends of the synchronous shaft are fixedly connected to the drive gear 51 and the deflection rod 572, respectively. One end of the synchronous belt 53 is sleeved on the synchronous shaft, and the other end of the synchronous belt 53 is sleeved on the sleeve 54. A trigger 541 is protruding from the inner wall of the sleeve 54. The rotating component 55 is fixedly connected to the movable conductive rod 22 of the switch assembly 2. A notch 551 is recessed on the outer circumferential surface of the rotating component 55. The sleeve 54 is sleeved on the rotating component 55, and the trigger 541 is slidably disposed in the notch 551. When the synchronous belt 53 drives the sleeve 54 to rotate relative to the rotating component 55 until the trigger 541 abuts against the groove wall of the notch 551, the rotation of the sleeve 54 can drive the rotating component 55 to rotate synchronously, thereby driving the switch assembly 2 to switch between the disconnected position and the connected position.

[0084] Specifically, when the power-off circuit is connected, the trigger 541 abuts against one side wall of the notch 551. When the drive gear 51 rotates, it drives the sleeve 54 to rotate via the synchronous belt 53. The trigger 541 inside the sleeve 54 disengages from one side wall of the notch 551 and rotates within the notch 551 of the rotating member 55, preventing the rotating member 55 from driving the movable conductive rod 22. When the sleeve 54 rotates to the point where the trigger 541 abuts against the opposite side wall of the notch 551, the rotating member 55 synchronously drives the movable conductive rod 22, causing it to rotate relative to the fixed base 21. Afterward, the drive gear 51 continues to rotate, causing the trigger 541 to drive the rotating member 55 and the movable conductive rod 22 to continue rotating, allowing the movable conductive rod 22 to completely disengage from the stationary contact 211, thus achieving the switching of the switch assembly 2 between the connected and disconnected positions. This configuration ensures the consistency of movement between the linkage assembly 5 and the switch assembly 2.

[0085] Optionally, such as Figure 5As shown, in this embodiment, the linkage component 5 is also provided with a damping element (not shown in the figure), which is disposed between the rotating component 55 and the protective shell 6. This arrangement prevents the movable conductive rod 22 from rotating due to its own weight when the switch component 2 is in the off position, thus avoiding a safety accident caused by switching from the off position to the connected position. This improves safety during operation.

[0086] Furthermore, such as Figures 4-5 and Figures 10-11 As shown, the drive assembly 4 includes a slider 42, a connecting rod 43, an elastic element 44, and a rack 45; wherein, the slider 42 is slidably disposed on the base 1 along a first direction, and the slider 42 includes a first inclined surface 421 and a second inclined surface 422 connected to each other, both the first inclined surface 421 and the second inclined surface 422 are inclined upward towards the center of the slider 42, so that the first inclined surface 421 and the second inclined surface 422 can be connected to form a wave-like structure; the rack 45 extends along the first direction, and the rack 45 is fixed. The rack 45 is fixedly installed on one side of the sliding member 42 and is connected to the drive gear 51 of the linkage assembly 5. The length of the plug rod 43 extends along the second direction, which is perpendicular to the first direction. One end of the plug rod 43 slides against the first inclined surface 421 or the second inclined surface 422, and the other end of the plug rod 43 passes through the bearing member 46, which is fixedly installed. The elastic member 44 is sleeved on the plug rod 43, and the two ends of the elastic member 44 abut against the plug rod 43 and the bearing member 46, respectively.

[0087] When the slider 42 is pushed to slide along the first direction and closer to the switch assembly 2, the plug rod 43 slides along the first inclined surface 421 to compress the elastic element 44 upward in the second direction. When the plug rod 43 slides to the top of the connection between the first inclined surface 421 and the second inclined surface 422, the slider 42 can automatically continue to slide along the first direction and closer to the switch assembly 2 under the elastic force of the elastic element 44. That is, the movement of the slider 42 along the first direction can be divided into a manual process and an automatic process. The manual process is that the slider 42 is manually pushed so that the plug rod 43 slides along the first inclined surface 421 to the top of the connection between the first inclined surface 421 and the second inclined surface 422, and the elastic element 44 is compressed. The automatic process is that the plug rod 43 automatically slides along the second inclined surface 422 under the elastic force of the elastic element 44, and then automatically pushes the slider 42 to continue to slide along the first direction and closer to the switch assembly 2. The above configuration ensures that the movement of the drive assembly 4 is continuous and accurate, with each component cooperating to drive the circuit breaker tripping device. Optionally, in this embodiment, the rack 45 meshes with the drive gear 51 to drive the linkage assembly 5 through the drive assembly 4. Since the meshing motion between the rack 45 and the drive gear 51 is existing technology, it will not be described in detail here.

[0088] Optionally, such as Figure 11 and Figure 12 As shown, in this embodiment, the drive assembly 4 further includes a manual lever 41. The first end of the manual lever 41 is fixed to one side of the slider 42, and the second end of the manual lever 41 passes through the cabinet 10 and is exposed on the outside of the cabinet 10. Pushing the manual lever 41, which in turn moves the slider 42, makes the movement of the drive assembly 4 more convenient. It should be noted that the outer peripheral surface of the second end of the manual lever 41 is serrated to facilitate manual pushing.

[0089] Optionally, such as Figure 3-5 and Figure 11 As shown, in this embodiment, the driving component 4 further includes a limiting block 47, which is connected to the sliding member 42. The base 1 has a groove extending along a first direction, allowing the limiting block 47 to slide within the groove along the first direction. By providing the limiting block 47, the movement of the sliding member 42 in the first direction can be guided and limited. Specifically, the limiting block 47 can be a T-shaped block, a rectangular block, or an L-shaped block, preferably a T-shaped block.

[0090] Optionally, such as Figure 4 , Figure 5 and Figure 8 As shown, in this embodiment, the plug-in rod 43 includes a main body 431 and a roller 432. One end of the main body 431 is movably connected to the roller 432, and the other end of the main body 431 passes through the bearing member 46. The roller 432 rolls against the first inclined surface 421 or the second inclined surface 422. This arrangement makes the movement between the plug-in rod 43 and the sliding member 42 smoother, greatly reducing friction and jamming during movement. In other embodiments, the roller 432 may be omitted or configured as a groove, etc., and this is not limited here.

[0091] Optionally, such as Figure 10 As shown, in this embodiment, both ends of the plug rod 43 are provided with bosses. One boss matches the inner diameter of the through hole 461 of the support member 46, and the other boss is used to abut against the elastic member 44. This arrangement provides guidance for the sliding of the plug rod 43 within the support member 46 in the second direction, preventing the plug rod 43 from wobbling within the through hole 461. Optionally, in this embodiment, the elastic member 44 is a spring; the specific structure of the elastic member 44 is not limited here.

[0092] Furthermore, the sliding member 42 also includes a first locking groove 423 and a second locking groove 424. The first locking groove 423 is disposed between one inner wall surface of the sliding member 42 and the first inclined surface 421, and the second locking groove 424 is disposed between the other inner wall surface of the sliding member 42 and the second inclined surface 422. When the plug rod 43 is located in the first locking groove 423 or the second locking groove 424, it can restrict the movement of the sliding member 42 in the first direction. When the switch assembly 2 is in the connected position, that is, when the circuit breaker's power-off circuit is connected, the plug rod 43 is located in the first locking groove 423; when the switch assembly 2 is in the disconnected position, that is, when the circuit breaker's power-off circuit is disconnected, the plug rod 43 is located in the second locking groove 424.

[0093] Specifically, when the sliding member 42 is manually pushed to slide along the first direction and towards the switch assembly 2, the plug rod 43 disengages from the first locking groove 423 and slides along the first inclined surface 421 to compress the elastic member 44 in the second direction. When the plug rod 43 slides to the top of the connection between the first inclined surface 421 and the second inclined surface 422, the plug rod 43 automatically slides along the second inclined surface 422 under the elastic force of the elastic member 44, thereby automatically pushing the sliding member 42 to slide along the first direction and towards the switch assembly 2. When the plug rod 43 slides to the second locking groove 424, the sliding member 42 stops sliding and cannot continue to slide towards the switch assembly 2. The above settings accurately reflect the close connection between the sliding member 42 and the circuit breaker's power-off circuit, enabling accurate control and representation of the on / off state of the entire power-off circuit, thereby ensuring the safety and stability of the circuit breaker tripping device under different operating conditions.

[0094] To facilitate understanding of the circuit breaker tripping device and high-voltage switchgear in this embodiment, the specific working process of the circuit breaker tripping device is now explained:

[0095] S1. Manual process: When the plug rod 43 is located in the first locking groove 423, manually push the manual lever 41 in the first direction and in the direction close to the switch assembly 2 to drive the slider 42 to slide in the first direction and in the direction close to the switch assembly 2 until the roller 432 of the plug rod 43 moves to the top of the connection between the first inclined surface 421 and the second inclined surface 422 of the slider 42, and the elastic element 44 is compressed; at the same time, the rack 45 drives the drive gear 51 to rotate, and the deflection rod 572 drives the protrusion 571 to slide in the first sliding groove 521 of the guide 52 until the protrusion 571 slides to the junction of the first sliding groove 521 and the second sliding groove 522. At this time, the sliding electrode 332 slides to the rightmost end of the resistor 331.

[0096] S2. Automatic process: The plug rod 43 slides along the second inclined surface 422 under the elastic force of the elastic member 44, so as to automatically push the sliding member 42 to slide quickly in the first direction and close to the switch assembly 2; at the same time, the rack 45 continues to drive the drive gear 51 to rotate. At this time, the deflection rod 572 drives the protrusion 571 to slide in the second sliding groove 522 of the guide member 52, so that the sliding electrode 332 remains stationary at the rightmost end of the resistor 331; at the same time, the trigger member 541 disengages from one side wall of the notch groove 551 and rotates in the notch groove 551. When the protrusion 571 slides to the end of the second sliding groove 522 of the guide member 52, the trigger member 541 is in contact with the opposite side wall of the notch groove 551, so that the rotating member 55 rotates quickly, driving the movable conductive rod 22 to disengage from the stationary contact 211, so that the switch assembly 2 is quickly disconnected, realizing the tripping operation of the circuit breaker.

[0097] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. 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 the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A circuit breaker tripping device, characterized in that, include: Base (1); A switch assembly (2) is disposed on the base (1). The switch assembly (2) is connected in series in the power-off circuit of the circuit breaker. The switch assembly (2) has an open position and an open position. A resistor assembly (3) is disposed on the base (1). The resistor assembly (3) is connected in series in the power-off circuit. The resistor assembly (3) can adjust its resistance value connected in the power-off circuit. The resistor assembly (3) has a maximum resistance value position and a working resistance value position. The circuit breaker tripping device also includes: Linkage component (5), which is connected to the switch component (2) and the resistor component (3) respectively; A drive component (4) is disposed on the base (1), and the drive component (4) is drivenly connected to the linkage component (5); The linkage component (5) includes: The drive gear (51) is driven by the drive assembly (4) to rotate. The guide (52) and the resistor assembly (3) are used to be fixedly connected to the guide (52); A deflector (57) has one end coaxially connected to the drive gear (51), and the other end of the deflector (57) can slide within the guide (52) to drive the guide (52) to move along a first direction to adjust the resistance value of the resistor assembly (3) connected to the power-off circuit. The first direction is parallel to the length direction of the base (1). The deflector (57) includes: A deflection rod (572) has one end coaxially connected to the drive gear (51), and the length of the deflection rod (572) extends along a first direction; A protruding post (571) is protruding at the other end of the deflection rod (572). The protruding post (571) can slide within the guide member (52), and the protruding post (571) can drive the guide member (52) to move along a first direction. The linkage component (5) also includes: A synchronous shaft is coaxial and its two ends are fixedly connected to the drive gear (51) and the deflection rod (572) respectively. Synchronous belt (53), one end of which is sleeved on the synchronous shaft; The sleeve (54) has the other end of the synchronous belt (53) sleeved on the sleeve (54), and the inner wall surface of the sleeve (54) is provided with a trigger (541). A rotating component (55) is fixedly connected to the switch assembly (2). The outer peripheral surface of the rotating component (55) is recessed with a notch (551). The sleeve (54) is sleeved on the rotating component (55), and the trigger (541) is slidably disposed in the notch (551). The synchronous belt (53) can drive the sleeve (54) to rotate relative to the rotating component (55). When the trigger (541) abuts against the groove wall of the notch (551), the rotating component (55) rotates, so as to drive the switch assembly (2) to switch between the disconnected position and the connected position. The driving component (4) includes: A slider (42) is slidably disposed on the base (1) along a first direction. The slider (42) includes a first inclined surface (421) and a second inclined surface (422) connected to each other. Both the first inclined surface (421) and the second inclined surface (422) are inclined upward toward the center of the slider (42). A rack (45) extends along a first direction and is fixedly installed to the sliding member (42). The rack (45) is connected to the linkage assembly (5) in a transmission manner. The plug rod (43) extends along a second direction, which is perpendicular to the first direction. One end of the plug rod (43) slides against the first inclined surface (421) or the second inclined surface (422), and the other end passes through the support member (46), which is fixedly installed. An elastic element (44) is sleeved on the plug rod (43), and the two ends of the elastic element (44) abut against the plug rod (43) and the bearing element (46) respectively. When the slider (42) is pushed to slide along the first direction and close to the switch assembly (2), the plug rod (43) slides along the first inclined surface (421) to compress the elastic element (44) in the second direction; when the plug rod (43) slides to the top of the connection between the first inclined surface (421) and the second inclined surface (422), the slider (42) can slide along the first direction and close to the switch assembly (2) under the elastic force of the elastic element (44); When the resistor component (3) is located at the maximum resistance value position, the switch component (2) is in the disconnect position to disconnect the power-off circuit; when the resistor component (3) is located at the working resistance value position, the switch component (2) is in the connected position to connect the power-off circuit.

2. The circuit breaker tripping device according to claim 1, characterized in that, The resistor assembly (3) includes: A sliding rheostat (33) is installed on the base (1). The sliding rheostat (33) is connected in series in the power-off circuit. The resistance value of the sliding rheostat (33) connected in the power-off circuit is adjustable.

3. The circuit breaker tripping device according to claim 1, characterized in that, The guide member (52) is provided with a first sliding groove (521) and a second sliding groove (522) that are connected. The first sliding groove (521) is arranged in a straight line and extends along a first direction. The second sliding groove (522) is arranged in an arc shape. The protrusion (571) can slide in the first sliding groove (521) and the second sliding groove (522). When the drive gear (51) drives the protrusion (571) to slide to the junction between the first sliding groove (521) and the second sliding groove (522), the resistor assembly (3) is located at the position of the maximum resistance value.

4. The circuit breaker tripping device according to claim 1, characterized in that, The sliding member (42) further includes a first locking groove (423) and a second locking groove (424). The first locking groove (423) is disposed between one inner wall surface of the sliding member (42) and the first inclined surface (421). The second locking groove (424) is disposed between the other inner wall surface of the sliding member (42) and the second inclined surface (422). When the plug rod (43) is located in the first locking groove (423) or the second locking groove (424), it can restrict the movement position of the sliding member (42) in the first direction.

5. A high-voltage switchgear, characterized in that, It includes a circuit breaker, a cabinet (10), a power-off circuit, and a circuit breaker tripping device as described in any one of claims 1-4. The circuit breaker, the circuit breaker tripping device, and the power-off circuit are respectively disposed in the cabinet (10). The circuit breaker is connected in series in the power-off circuit. The circuit breaker tripping device is used to connect or disconnect the power-off circuit.

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