Circuit breaker opening tripping device and high-voltage switch cabinet

Abstract

The invention 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, the circuit breaker opening and tripping device is used for controlling the on-off of a power-off loop of a circuit breaker, and comprises a base, a switch assembly and a resistor assembly; wherein the switch assembly and the resistor assembly are respectively connected in series in the power-off loop, the switch assembly has a disconnection position and a connection position, the resistor assembly has a maximum resistance value position and a working resistance value position, and when the resistor assembly is located at the working resistance value position, the switch assembly is located at the connection position to connect the power-off loop; when the resistor assembly is located at the maximum resistance value position, the switch assembly is located at the disconnection position to disconnect the power-off loop. According to the circuit breaker opening tripping device, it can be guaranteed that high-voltage arcs are not likely to be generated in the circuit breaker, the safety of maintainers is protected, and it is guaranteed that the safety of a high-voltage switch cabinet is high.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage switch cabinets, and in particular to a circuit breaker tripping device and a high-voltage switch cabinet. Background Art

[0002] In high-voltage switchgear, circuit breakers are usually operated remotely. However, when a circuit breaker refuses to open (refusal to open is a typical fault in high-voltage switchgear, that is, the monitoring background cannot normally control the opening of the circuit breaker), the circuit breaker's power-off circuit cannot be disconnected by remote operation. Therefore, operation and maintenance personnel are required to operate at close range to disconnect the circuit breaker's power-off circuit.

[0003] However, since high-voltage arcs are easily generated inside the circuit breaker during the process of manually disconnecting the power-off circuit, these arcs can easily cause fires inside the entire high-voltage switch cabinet; and after the fire, it will bring potential dangers to the subsequent maintenance process of maintenance personnel, making the entire high-voltage switch cabinet more costly and less safe. Summary of the invention

[0004] The purpose of the present invention is to provide a circuit breaker tripping device and a high-voltage switch cabinet, so as to ensure that a high-voltage arc is not easily generated inside the circuit breaker, thereby avoiding fire inside the entire high-voltage switch cabinet; and avoiding potential dangers to subsequent maintenance personnel during the maintenance process, thereby ensuring that the cost of the entire high-voltage switch cabinet is low and the safety is high.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Circuit breaker tripping device, including:

[0007] Base;

[0008] A switch assembly is arranged on the base, the switch assembly is connected in series in the power-off circuit of the circuit breaker, and the switch assembly has a disconnection position and a connection position;

[0009] A resistor component is arranged on the base, the resistor component is connected in series in the power-off circuit, the resistor component can adjust its resistance value when connected to the power-off circuit, and the resistor component has a maximum resistance value position and a working resistance value position;

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

[0011] Preferably, the resistor assembly comprises:

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

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

[0014] A linkage component, wherein the linkage component is transmission-connected to the switch component and the resistance component respectively;

[0015] A driving assembly is arranged on the base, and the driving assembly is drivingly connected to the linkage assembly.

[0016] Preferably, the linkage component comprises:

[0017] A driving gear, wherein the driving assembly can drive the driving gear to rotate;

[0018] A guide member, the resistor assembly being used to be fixedly connected to the guide member;

[0019] A deflection member, one end of which is coaxially connected to the driving gear, and the other end of which is capable of sliding in the guide member to drive the guide member to move along a first direction to adjust the resistance value of the resistor component connected to the power-off circuit, wherein the first direction is parallel to the length direction of the base.

[0020] Preferably, the deflection member comprises:

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

[0022] A boss is convexly arranged on the other end of the deflection rod, the boss can slide in the guide member, and the boss can drive the guide member to move along the first direction.

[0023] Preferably, the guide member is provided with a first sliding groove and a second sliding groove which are connected to each other, the first sliding groove is provided in a straight line and extends along a first direction, the second sliding groove is provided in an arc shape, and the protrusion can slide in the first sliding groove and the second sliding groove;

[0024] Wherein, when the driving gear drives the boss to slide to the boundary position between the first sliding groove and the second sliding groove, the resistor component is located at the maximum resistance value position.

[0025] Preferably, the linkage component further comprises:

[0026] A synchronization shaft, coaxial and fixedly connected to the driving gear and the deflection rod at both ends;

[0027] A synchronous belt, one end of which is sleeved on the synchronous shaft;

[0028] A sleeve, the other end of the synchronous belt is sleeved on the sleeve, and a triggering member is convexly provided on the inner wall surface of the sleeve;

[0029] A rotating member is used to be fixedly connected to the switch assembly, the outer circumferential surface of the rotating member is concavely provided with a notch groove, the sleeve is sleeved on the rotating member, and the trigger member is slidably set in the notch groove, the synchronous belt can drive the sleeve to rotate relative to the rotating member, so that when the trigger member abuts against the groove wall of the notch groove, the rotating member rotates to drive the switch assembly to switch between the disconnected position and the connected position.

[0030] Preferably, the driving assembly comprises:

[0031] A sliding member is slidably disposed on the base along a first direction, the sliding member comprises a first inclined surface and a second inclined surface connected to each other, and the first inclined surface and the second inclined surface are both inclined upward toward the center of the sliding member;

[0032] A rack extending along a first direction, the rack being fixedly mounted to the sliding member, and the rack being transmission-connected to the linkage assembly;

[0033] A plug-in rod extending in a second direction perpendicular to the first direction, one end of the plug-in rod slidingly abutting against the first inclined surface or the second inclined surface, and the other end of the plug-in rod passing through the bearing member, the bearing member being fixedly arranged;

[0034] An elastic member is sleeved on the plug-in rod, and two ends of the elastic member are respectively in contact with the plug-in rod and the bearing member;

[0035] When the sliding member is pushed to slide along the first direction and close to the switch assembly, the plug-in rod slides along the first inclined surface to compress the elastic member along the second direction; when the plug-in rod slides to the connecting top end between the first inclined surface and the second inclined surface, the sliding member can slide along the first direction and close to the switch assembly under the elastic force of the elastic member.

[0036] Preferably, the sliding member also includes a first locking groove and a second locking groove, the first locking groove is arranged between an inner wall surface of the sliding member and the first inclined surface, and the second locking groove is arranged between another inner wall surface of the sliding member and the second inclined surface, and when the plug-in rod is located in the first locking groove or the second locking groove, it can limit the moving position of the sliding member in the first direction.

[0037] A high-voltage switch cabinet comprises a circuit breaker, a cabinet, a power-off circuit and the circuit breaker tripping device described above. The circuit breaker, the circuit breaker tripping device and the power-off circuit are respectively arranged in the cabinet. 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.

[0038] Beneficial effects of the present invention:

[0039] The present invention provides a circuit breaker tripping device, which is used for controlling the on and off of a power-off circuit of the circuit breaker, and comprises a base, a switch assembly and a resistor assembly; wherein the switch assembly and the resistor assembly are respectively connected in series in the power-off circuit, the switch assembly has a disconnection position and a connection position, and the resistor assembly has a maximum resistance value position and a working resistance value position; when the resistor assembly is at the working resistance value position, the switch assembly is at the connection position to connect the power-off circuit to ensure the normal operation of the circuit breaker; when the resistor assembly is at the maximum resistance value position, the switch assembly is at the disconnection position to disconnect the power-off circuit to achieve effective control of the power-off circuit of the circuit breaker, so that the power-off circuit of the circuit breaker can be cut off in time to prevent further expansion of the fault; because when the power-off circuit is cut off, the resistance value in the power-off circuit is the largest, that is, the current value in the power-off circuit is the smallest at this time, so that it can be ensured that a high-voltage arc is not easily generated inside the circuit breaker during the cutting process, so that a fire inside the entire high-voltage switch cabinet can be better avoided; and potential dangers to the subsequent maintenance process of maintenance personnel are avoided, thereby ensuring that the safety of the entire high-voltage switch cabinet is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a layout diagram of the circuit breaker tripping device provided in an embodiment of the present invention in a high-voltage switch cabinet;

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

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

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

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

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

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

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

[0048] Fig. 9 Schematic diagram of a sleeve of a circuit breaker tripping device provided in an embodiment of the present invention;

[0049] Fig.10 Schematic diagram of the plug-in rod of the circuit breaker tripping device provided by the embodiment of the present invention

[0050] Fig.11 Schematic diagram of a slider of a circuit breaker tripping device provided in an embodiment of the present invention;

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

[0052] In the figure:

[0053] 10. Cabinet;

[0054] 1. Base;

[0055] 2. Switch assembly; 21. Fixed seat; 211. Static contact; 22. Movable conductive rod;

[0056] 3. resistor assembly; 31. first conductive member; 32. second conductive member; 33. sliding rheostat; 331. resistor body; 332. sliding pole piece;

[0057] 4. driving assembly; 41. manual lever; 42. sliding member; 421. first inclined surface; 422. second inclined surface; 423. first locking groove; 424. second locking groove; 43. plug-in rod; 431. main body; 432. roller; 44. elastic member; 45. rack; 46. bearing member; 461. through hole; 47. limit block;

[0058] 5. linkage assembly; 51. driving gear; 52. guide member; 521. first sliding groove; 522. second sliding groove; 53. synchronous belt; 54. sleeve; 541. trigger member; 55. rotating member; 551. notch groove; 56. bracket; 57. deflection member; 571. boss; 572. deflection rod;

[0059] 6. Protective case. DETAILED DESCRIPTION

[0060] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0061] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0063] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0064] like Figure 1-Figure 2 As shown, the present invention provides a circuit breaker tripping device and a high-voltage switch cabinet, the high-voltage switch cabinet 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 arranged in 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. The circuit breaker, the cabinet 10 and the power-off circuit in this embodiment are all common structures in existing high-voltage switch cabinets, and the specific working principle is no longer described in detail here.

[0065] Specifically, the circuit breaker tripping device includes a base 1, a switch assembly 2 and a resistor assembly 3; wherein the switch assembly 2 and the resistor assembly 3 are both arranged 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 a disconnection position and a connection position, the resistor assembly 3 is connected in series in the power-off circuit, the resistor assembly 3 can adjust the resistance value connected to the power-off circuit, and the resistor assembly 3 has a maximum resistance value position and a working resistance value position. wherein, when the resistor assembly 3 is at the maximum resistance value position, the switch assembly 2 is at the disconnection position to disconnect the power-off circuit; when the resistor assembly 3 is at the working resistance value position, the switch assembly 2 is at the connection position to connect the power-off circuit.

[0066] Compared with the prior art, the circuit breaker tripping device in this embodiment changes the disconnection time of the circuit breaker when the circuit breaker refuses to trip. By connecting the switch assembly 2 and the resistor assembly 3 in series in the power-off circuit of the circuit breaker, the switch assembly 2 has a disconnection position and a connection position, and the resistance of the resistor assembly 3 is adjustable, having 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 disconnection position to disconnect the power-off circuit, so that the connection of the circuit breaker in the power-off circuit can be cut off in time to prevent the further expansion of the fault; because the resistance value in the power-off circuit is the largest when the power-off circuit is cut off, that is, the current value in the power-off circuit is the smallest at this time, so that the current value is below the safe current, so that it can be ensured that high-voltage arcs are not easily generated inside the circuit breaker, so as to better avoid fires inside the entire high-voltage switch cabinet; at the same time, the setting of the circuit breaker tripping device can ensure that there will be no potential danger to the subsequent maintenance process of the maintenance personnel, thereby ensuring that the safety of the entire high-voltage switch cabinet is high.

[0067] Alternatively, if Figure 2 As shown, in this embodiment, the switch assembly 2 includes a fixed seat 21 and a movable conductive rod 22; wherein the fixed seat 21 is fixedly installed on the base 1, the fixed seat 21 is connected in series with the resistor assembly 3, a static contact 211 is electrically connected to the fixed seat 21, one end of the movable conductive rod 22 is hinged to the fixed seat 21, and the other end of the movable conductive rod 22 can be rotated to be snapped into the static contact 211.

[0068] Specifically, when the other end of the movable conductive rod 22 is clamped into the static 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 static contact 211, the switch assembly 2 is in the disconnected position. The above arrangement makes the structure and operation of the switch assembly 2 relatively simple, and it is convenient to observe the on-off status of the power-off circuit. Here, the specific structure of the switch assembly 2 is not limited, and it is sufficient to realize the on-off of the power-off circuit.

[0069] Alternatively, if Figure 1-Figure 3As shown, in this embodiment, the resistor assembly 3 includes a sliding rheostat 33, which is installed on the base 1 and connected in series in the power-off circuit. The resistance value of the sliding rheostat 33 connected to the power-off circuit is adjustable. By changing the resistance value of the sliding rheostat 33 connected to the power-off circuit, the current in the power-off circuit can be directly affected; when the resistance value of the sliding rheostat 33 connected to the power-off circuit is the largest, the resistor assembly 3 is at the maximum resistance value position, that is, at this time, the current value in the power-off circuit is the smallest, and the current value is below the safe current.

[0070] By setting the sliding rheostat 33, the resistance value adjustment method of the resistor component 3 is simpler and more convenient. The resistance value of the power-off circuit can be precisely controlled by simply and conveniently adjusting the resistance value of the sliding rheostat 33, which greatly reduces the error that may occur during the adjustment process. At the same time, the sliding rheostat 33 has good high temperature resistance, so as to prevent the sliding rheostat 33 from being damaged due to excessive heat generated by the current in the power-off circuit.

[0071] Specifically, 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 resistor 331 and a sliding pole piece 332. The sliding pole piece 332 is slidably arranged on the resistor 331 along the first direction. The sliding pole piece 332 is electrically connected to the resistor 331. Moving the position of the sliding pole piece 332 on the resistor 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 maximum resistance value position.

[0072] Alternatively, if Figure 2 As shown, in this embodiment, the resistor assembly 3 also includes a first conductive member 31 and a second conductive member 32. The first conductive member 31 is electrically connected to the first end of the fixed seat 21 and is connected to the power-off circuit. The second conductive member 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 seat 21 and the second end of the sliding rheostat 33 are connected in series through a wire.

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

[0074] Alternatively, if 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, and the length of the protective shell 6 extends along the 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, and ensures the working reliability and stability of the entire circuit breaker tripping device.

[0075] Furthermore, if Figure 2-Figure 5 As shown, the circuit breaker tripping device also includes a linkage component 5 and a drive component 4, wherein the linkage component 5 is respectively connected to the switch component 2 and the resistor component 3 in a transmission manner, and the drive component 4 is arranged on the base 1, and the drive component 4 is connected to the linkage component 5 in a driving manner.

[0076] When the driving component 4 is started, it can transmit power to the linkage component 5, so that the linkage component 5 moves according to the predetermined motion route, thereby driving the switch component 2 and the resistor component 3 connected thereto to work in coordination; the above arrangement prevents the switch component 2 from disconnecting the power-off circuit when the resistor component 3 is not at the maximum resistance value position; at the same time, it prevents the switch component 2 from being in the connected position and the power-off circuit from being disconnected when the resistor component 3 is already at the maximum resistance value position, thereby reducing the action fault tolerance rate of the circuit breaker tripping device and simplifying the steps. It should be noted that, in the present embodiment, the linkage component 5 is respectively connected to the movable conductive rod 22 in the switch component 2 and the sliding pole piece 332 in the resistor component 3 in a transmission manner.

[0077] Furthermore, if Figure 2-Figure 5 As shown, the linkage assembly 5 includes a driving gear 51, a guide 52 and a deflection member 57; wherein the driving assembly 4 can drive the driving gear 51 to rotate, the sliding pole piece 332 of the resistor assembly 3 is used to be fixedly connected to the guide 52, one end of the deflection member 57 is coaxially connected to the driving gear 51, and the other end of the deflection member 57 can slide in the guide 52, so that the guide 52 can be driven to move along the first direction through the deflection rod 572 to adjust the resistance value of the resistor 331 connected to the power-off circuit. The above-mentioned setting can convert the rotation of the driving gear 51 into a linear sliding of the guide 52 along the first direction, and then adjust the resistance value of the resistor 331 connected to the power-off circuit, so as to achieve accurate control of the current of the power-off circuit, ensure the stable operation of the power-off circuit and the normal realization of the circuit breaker tripping action, and the driving assembly 4 has a simple structure and is easy to operate. Optionally, in this embodiment, the linkage assembly 5 is fitted and connected to the protective shell 6 to ensure the movement accuracy of the linkage assembly 5. Specifically, the guide 52 is fitted and connected to the protective shell 6.

[0078] Alternatively, if Figure 2-Figure 5As shown, in this embodiment, the linkage assembly 5 further includes a bracket 56, the bracket 56 is fixed on the base 1, and the driving gear 51 is rotatably connected to the bracket 56. The above arrangement provides support for the driving gear 51, avoids problems such as jamming and failure that may be caused by unstable support for the driving gear 51, and improves the reliability and stability of the linkage assembly 5.

[0079] Alternatively, if Figure 2-Figure 5 As shown, the deflection member 57 includes a boss 571 and a deflection rod 572, wherein one end of the deflection rod 572 is coaxially connected to the driving gear 51, the length of the deflection rod 572 extends along the first direction, the boss 571 is convexly arranged at the other end of the deflection rod 572, the boss 571 can slide in the guide member 52, and the boss 571 can drive the guide member 52 to move along the first direction. When the driving gear 51 rotates, the rotational motion is transmitted to the boss 571 through the deflection rod 572, so that the boss 571 can slide linearly in the guide member 52, and the rotational motion of the driving gear 51 is converted into the linear sliding of the guide member 52 along the first direction, thereby ensuring the movement accuracy and stability of the linkage assembly 5, and adjusting the resistance value of the sliding rheostat 33 connected to the power-off circuit.

[0080] Furthermore, if Figure 2 As shown, the guide member 52 is provided with a first sliding groove 521 and a second sliding groove 522 which are connected to each other. The first sliding groove 521 is arranged in a straight line and extends along the first direction, and the second sliding groove 522 is arranged in an arc shape. The boss 571 can slide in the first sliding groove 521 and the second sliding groove 522; and when the driving gear 51 drives the boss 571 to slide to the junction position between the first sliding groove 521 and the second sliding groove 522, at this time, the sliding pole piece 332 moves to the rightmost end of the resistor body 331 in the opposite direction of the first direction, and the resistor assembly 3 is located at the maximum resistance value position. The above arrangement provides a stable and clear-direction trajectory for the sliding of the boss 571, and realizes the precise positioning of the maximum resistance value position. In other embodiments, the second sliding groove 522 may not be provided, as long as it can be ensured that when the boss 571 moves to the leftmost side of the first sliding groove 521, the sliding rheostat 33 is located at the maximum resistance value position.

[0081] Alternatively, if 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 boss 571 slides to the intersection 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, thereby ensuring the consistency of the movements of the guide member 52 and the sliding rheostat 33.

[0082] Alternatively, if Figure 2-Figure 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 boss 571 and the axis of the driving gear 51 are equal. When the driving gear 51 drives the boss 571 to cross the intersection of the first sliding groove 521 and the second sliding groove 522 and continue to slide in the second sliding groove 522, since the sliding track of the boss 571 is the same as the arc shape of the second sliding groove 522, the position of the guide member 52 remains unchanged, that is, it can ensure that the sliding rheostat 33 remains unchanged at the maximum resistance value position. The above-mentioned setting further ensures the accuracy of the maximum resistance value position, and provides a basis for the switch assembly 2 to realize the disconnection of the circuit breaker without generating a high-voltage arc.

[0083] Furthermore, if Figure 4 and Figure 6-Figure 9 As shown, the linkage assembly 5 also includes a synchronous shaft, a synchronous belt 53, a sleeve 54 and a rotating member 55; wherein the synchronous shaft is coaxial with the driving gear 51, and the opposite ends of the synchronous shaft are fixedly connected to the driving 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, and the inner wall surface of the sleeve 54 is convexly provided with a trigger member 541, and the rotating member 55 is used to be fixedly connected with the movable conductive rod 22 of the switch assembly 2, and the outer peripheral surface of the rotating member 55 is concavely provided with a notch groove 551, the sleeve 54 is sleeved on the rotating member 55, and the trigger member 541 is slidably set in the notch groove 551; when the synchronous belt 53 drives the sleeve 54 to rotate relative to the rotating member 55, until the trigger member 541 abuts against the groove wall of the notch groove 551, at this time, the rotation of the sleeve 54 can drive the rotating member 55 to rotate synchronously, and then can drive 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 member 541 abuts against one side wall of the notch groove 551; when the driving gear 51 rotates, the sleeve 54 is driven to rotate through the synchronous belt 53, and the trigger member 541 in the sleeve 54 is separated from one side wall of the notch groove 551, and rotates in the notch groove 551 of the rotating member 55, so that the rotating member 55 does not drive the movable conductive rod 22 to move; when the sleeve 54 rotates to make the trigger member 541 abut against the other side wall of the notch groove 551, at this time, the rotating member 55 can synchronously drive the movable conductive rod 22, so that the movable conductive rod 22 rotates relative to the fixed seat 21; thereafter, the driving gear 51 continues to rotate, so that the trigger member 541 will drive the rotating member 55 and the movable conductive rod 22 to continue to rotate, so that the movable conductive rod 22 can be completely separated from the static contact 211, and the switch assembly 2 can be switched between the connected position and the disconnected position. The above arrangement realizes the movement consistency of the linkage assembly 5 and the switch assembly 2.

[0085] Alternatively, if Figure 5As shown, in this embodiment, the linkage assembly 5 is further provided with a damping member (not shown in the figure), which is arranged between the rotating member 55 and the protective shell 6. The above arrangement prevents the movable conductive rod 22 from driving the rotating member 55 to rotate due to its own gravity when the switch assembly 2 is in the disconnected position, thereby preventing a safety accident caused by switching from the disconnected position to the connected position, so as to improve the safety during the working process.

[0086] Furthermore, if Figure 4-Figure 5 and Figure 10-11 As shown, the driving assembly 4 includes a sliding member 42, a plug rod 43, an elastic member 44 and a rack 45; wherein the sliding member 42 is slidably disposed on the base 1 along a first direction, and the sliding member 42 includes a first inclined surface 421 and a second inclined surface 422 connected to each other, and the first inclined surface 421 and the second inclined surface 422 are both inclined upward toward the center of the sliding member 42, so that the first inclined surface 421 and the second inclined surface 422 can be connected to form a wavy structure; the rack 45 extends along the first direction, and the rack 45 is fixed It is fixedly installed on one side of the sliding member 42, the rack 45 is transmission connected with the driving gear 51 of the linkage assembly 5, the length of the plug-in rod 43 extends along the second direction, the second direction is perpendicular to the first direction, one end of the plug-in rod 43 slides and abuts against the first inclined surface 421 or the second inclined surface 422, and the other end of the plug-in rod 43 is inserted into the supporting member 46, and the supporting member 46 is fixedly arranged; the elastic member 44 is sleeved on the plug-in rod 43, and the two ends of the elastic member 44 abut against the plug-in rod 43 and the supporting member 46 respectively.

[0087] When the sliding member 42 is pushed to slide along the first direction and close to the switch assembly 2, the plug-in rod 43 slides along the first inclined surface 421 to compress the elastic member 44 upward along the second direction; when the plug-in rod 43 slides to the connecting top between the first inclined surface 421 and the second inclined surface 422, the sliding member 42 can automatically continue to slide along the first direction and close to the switch assembly 2 under the elastic force of the elastic member 44; that is, the movement of the sliding member 42 along the first direction can be divided into a manual process and an automatic process. The manual process is to manually push the sliding member 42 to make the plug-in rod 43 slide along the first inclined surface 421 to the connecting top of the first inclined surface 421 and the second inclined surface 422, and the elastic member 44 is compressed; the automatic process is that the plug-in 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 continue to slide along the first direction and close to the switch assembly 2. The above arrangement makes the movement process of the driving assembly 4 coherent and accurate, and the various components cooperate with each other to realize the driving process of the circuit breaker tripping device. Optionally, in this embodiment, the rack 45 is meshed and connected with the driving gear 51 to realize the movement of the linkage assembly 5 driven by the driving assembly 4. Since the meshing movement between the rack 45 and the driving gear 51 is a prior art, it will not be described in detail here.

[0088] Alternatively, if Fig.11 and Fig.12 As shown, in this embodiment, the driving assembly 4 further includes a manual rod 41, a first end of the manual rod 41 is fixed to one side of the sliding member 42, and a second end of the manual rod 41 passes through the cabinet 10 and is exposed to the outside of the cabinet 10. By pushing the manual rod 41 and then pushing the sliding member 42 to move, the movement of the driving assembly 4 is made more convenient. It should be noted that the outer peripheral surface of the second end of the manual rod 41 is set to be serrated, which is convenient for manual pushing operation.

[0089] Alternatively, if Figure 3-5 and Fig.11 As shown, in this embodiment, the driving assembly 4 further includes a limit block 47, the limit block 47 is connected to the sliding member 42, and a slide groove extending along the first direction is provided on the base 1, and the limit block 47 can slide in the slide groove along the first direction. By providing the limit block 47, the movement of the sliding member 42 in the first direction can be guided and limited. The limit block 47 can be specifically a T-shaped block, a rectangular block or an L-shaped block, etc., preferably a T-shaped block.

[0090] Alternatively, if Figure 4 , Figure 5 and Figure 8 As shown, in this embodiment, the plug 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, the other end of the main body 431 is inserted into the bearing member 46, and the roller 432 rolls against the first inclined surface 421 or the second inclined surface 422. The above arrangement makes the movement between the plug rod 43 and the sliding member 42 smoother, greatly reducing the friction and jamming during the movement. In other embodiments, the roller 432 may not be provided or may be provided in the form of a slide groove, etc., which is not limited here.

[0091] Alternatively, if Fig.10 As shown, in this embodiment, bosses are provided at both ends of the plug rod 43, wherein the boss at one end matches the inner diameter of the through hole 461 of the carrier 46, and the boss at the other end is used to abut against the elastic member 44. The above arrangement allows the plug rod 43 to slide along the second direction in the carrier 46 with a certain guide, thereby preventing the plug rod 43 from shaking in the through hole 461. Optionally, in this embodiment, the elastic member 44 is a spring, and the specific structure of the elastic member 44 is not limited here.

[0092] Furthermore, 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 an inner wall surface of the sliding member 42 and the first inclined surface 421, and the second locking groove 424 is disposed between another inner wall surface of the sliding member 42 and the second inclined surface 422. When the plug-in rod 43 is located in the first locking groove 423 or the second locking groove 424, the movement position of the sliding member 42 in the first direction can be limited. When the switch assembly 2 is in the connected position, that is, the power-off circuit of the circuit breaker is in the connected state, the plug-in rod 43 is located in the first locking groove 423; when the switch assembly 2 is in the disconnected position, that is, the power-off circuit of the circuit breaker is in the disconnected state, the plug-in rod 43 is located in the second locking groove 424.

[0093] Specifically, when the sliding member 42 is manually pushed to slide in the first direction and close to 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 connecting top 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 in the first direction and close to 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 in the direction close to the switch assembly 2. The above-mentioned setting accurately reflects the close connection between the sliding member 42 and the power-off circuit of the circuit breaker, so that the on-off state of the entire power-off circuit can be accurately controlled and reflected, thereby ensuring the safety and stability of the circuit breaker tripping device under different working conditions.

[0094] In order to facilitate understanding of the circuit breaker tripping device and the high-voltage switch cabinet in this embodiment, the specific working process of the circuit breaker tripping device is now described:

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

[0096] S2, automatic process: the plug-in 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 along the first direction and close to the switch assembly 2; at the same time, the rack 45 continues to drive the driving gear 51 to rotate. At this time, the deflection rod 572 drives the protruding column 571 to slide in the second sliding groove 522 of the guide member 52, so that the sliding pole piece 332 remains at the rightmost end of the resistor 331 and does not move; 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 protruding column 571 slides to the end of the second sliding groove 522 of the guide member 52, the trigger member 541 fits with the other 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 static contact 211, so that the switch assembly 2 is quickly disconnected, and the circuit breaker is tripped.

[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 embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Circuit breaker tripping device, characterized in that: include: Base (1); A switch assembly (2) is arranged on the base (1), the switch assembly (2) is connected in series to a power-off circuit of a circuit breaker, and the switch assembly (2) has a disconnect position and a connection position; A resistor component (3) is arranged on the base (1), the resistor component (3) is connected in series in the power-off circuit, the resistor component (3) can adjust its resistance value when connected to the power-off circuit, and the resistor component (3) has a maximum resistance value position and a working resistance value position; Wherein, when the resistor component (3) is located at the maximum resistance value position, the switch component (2) is located at the disconnection 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 located at the connection position to connect the power-off circuit.

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

3. The circuit breaker tripping device according to claim 1 or 2, characterized in that: The circuit breaker tripping device also includes: A linkage component (5), wherein the linkage component (5) is respectively connected in transmission with the switch component (2) and the resistor component (3); A driving component (4) is arranged on the base (1), and the driving component (4) is drivingly connected to the linkage component (5).

4. The circuit breaker tripping device according to claim 3, characterized in that: The linkage component (5) comprises: A driving gear (51), wherein the driving assembly (4) is capable of driving the driving gear (51) to rotate; A guide member (52), wherein the resistor assembly (3) is used to be fixedly connected to the guide member (52); A deflection member (57), one end of the deflection member (57) is coaxially connected to the driving gear (51), and the other end of the deflection member (57) is capable of sliding in the guide member (52) to drive the guide member (52) to move along a first direction to adjust the resistance value of the resistor component (3) connected to the power-off circuit, and the first direction is parallel to the length direction of the base (1).

5. The circuit breaker tripping device according to claim 4, characterized in that: The deflection member (57) comprises: A deflection rod (572), one end of which is coaxially connected to the driving gear (51), and the length of the deflection rod (572) extends along a first direction; A convex column (571) is convexly arranged on the other end of the deflection rod (572); the convex column (571) can slide in the guide member (52), and the convex column (571) can drive the guide member (52) to move along the first direction.

6. The circuit breaker tripping device according to claim 5, characterized in that: The guide member (52) is provided with a first sliding groove (521) and a second sliding groove (522) which are connected to each other, 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, and the protrusion (571) can slide in the first sliding groove (521) and the second sliding groove (522); When the driving gear (51) drives the boss (571) to slide to the boundary position between the first sliding groove (521) and the second sliding groove (522), the resistor component (3) is located at the maximum resistance value position.

7. The circuit breaker tripping device according to any one of claims 5 or 6, characterized in that: The linkage component (5) further comprises: A synchronization shaft, coaxial and having two ends respectively fixedly connected to the driving gear (51) and the deflection rod (572); A synchronous belt (53), one end of which is sleeved on the synchronous shaft; A sleeve (54), the other end of the synchronous belt (53) is sleeved on the sleeve (54), and a triggering member (541) is convexly provided on the inner wall surface of the sleeve (54); The rotating member (55) is used for being fixedly connected with the switch assembly (2); the outer peripheral surface of the rotating member (55) is concavely provided with a notch groove (551); the sleeve (54) is sleeved on the rotating member (55), and the trigger member (541) is slidably arranged in the notch groove (551); the synchronous belt (53) can drive the sleeve (54) to rotate relative to the rotating member (55); when the trigger member (541) abuts against the groove wall of the notch groove (551), the rotating member (55) rotates, so as to drive the switch assembly (2) to switch between the disconnected position and the connected position.

8. The circuit breaker tripping device according to claim 3, characterized in that: The driving assembly (4) comprises: A sliding member (42) is slidably disposed on the base (1) along a first direction, the sliding member (42) comprising a first inclined surface (421) and a second inclined surface (422) connected to each other, the first inclined surface (421) and the second inclined surface (422) both being inclined upward toward the center of the sliding member (42); A rack (45) extending along a first direction, the rack (45) being fixedly mounted to the sliding member (42), and the rack (45) being drivingly connected to the linkage assembly (5); The plug-in rod (43) extends along a second direction, the second direction is perpendicular to the first direction, one end of the plug-in rod (43) is slidably abutted against the first inclined surface (421) or the second inclined surface (422), and the other end is inserted into the bearing member (46), and the bearing member (46) is fixedly arranged; An elastic member (44) is sleeved on the plug-in rod (43), and two ends of the elastic member (44) are respectively in contact with the plug-in rod (43) and the bearing member (46); When the sliding member (42) is pushed to slide along the first direction and in a direction close to the switch assembly (2), the plug-in rod (43) slides along the first inclined surface (421) to compress the elastic member (44) along the second direction; when the plug-in rod (43) slides to the connecting top end between the first inclined surface (421) and the second inclined surface (422), the sliding member (42) can slide along the first direction and in a direction close to the switch assembly (2) under the action of the elastic force of the elastic member (44).

9. The circuit breaker tripping device according to claim 8, characterized in that: The sliding member (42) further comprises a first locking groove (423) and a second locking groove (424), wherein the first locking groove (423) is arranged between an inner wall surface of the sliding member (42) and the first inclined surface (421), and the second locking groove (424) is arranged between another inner wall surface of the sliding member (42) and the second inclined surface (422), and when the plug-in rod (43) is located in the first locking groove (423) or the second locking groove (424), the moving position of the sliding member (42) in the first direction can be limited.

10. High voltage switchgear, characterized in that: The invention comprises a circuit breaker, a cabinet (10), a power-off circuit, and a circuit breaker tripping device as described in any one of claims 1 to 9, wherein the circuit breaker, the circuit breaker tripping device, and the power-off circuit are respectively arranged in 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.

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