Double-moving-contact vacuum circuit breaker structure and control method thereof

Abstract

The invention discloses a double-moving-contact vacuum circuit breaker structure driven by double electromagnetic repulsion mechanisms and a control method of the double-moving-contact vacuum circuit breaker structure. In the double-moving-contact vacuum circuit breaker structure, a vacuum arc extinguish chamber is provided with a first moving contact and a second moving contact which act independently; the first electromagnetic repulsion mechanism is directly connected to the first moving contact through a first pull rod, the second electromagnetic repulsion mechanism is directly connected to the second moving contact through a second pull rod, and the double-moving-contact vacuum circuit breaker structure opens and closes normal current through alternate single-side actions of the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism. According to the invention, the driving speed required when the normal working current is cut off to carry out single-side opening is obviously reduced, the stress of each transmission part of the circuit breaker during opening action is reduced, and the mechanical life of the transmission part is prolonged; and meanwhile, the inductor is additionally arranged on the closing stop piece, so that faults such as contact abrasion of the circuit breaker and the like can be monitored in time, and convenience is provided for state monitoring of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum circuit breakers, and particularly to a structure of a double-moving-contact vacuum circuit breaker driven by a double-electromagnetic repulsion mechanism and a control method thereof. Background Art

[0002] A circuit breaker is a switching device that can close, carry, and interrupt the current under normal operating conditions and can close, carry, and interrupt the current under fault conditions within a specified time. Vacuum circuit breakers have the advantages of environmental protection and fast starting time, and are widely used in distribution systems and DC systems. At present, researchers are working hard to develop vacuum interruption technology towards high current and high voltage, which also puts higher requirements on the operating speed of vacuum circuit breakers. At the same time, with the increase of the breaking voltage and breaking current, the moving mass of the vacuum circuit breaker will increase significantly. The electromagnetic rapid repulsion mechanism is widely used in vacuum circuit breakers that require rapid interruption due to its advantages such as easy installation, fast starting speed, fast tripping speed, and easy control.

[0003] For the tripping situation, due to the increase in the moving mass and tripping speed, the kinetic energy required by the vacuum circuit breaker during the operation process increases, and the mechanical performance requirements for transmission parts are significantly improved. As a common transmission part connecting the vacuum interrupter and the electromagnetic repulsion mechanism, the insulating rod often bears a huge tensile stress due to transmitting the huge acceleration during the rapid tripping process and thus breaks. For the closing situation, although the closing buffer can be used to reduce the closing collision speed to reduce the stress of each component during the collision, in order to prevent situations such as contact welding of the contacts, the closing speed is not easy to be too small. With the increase of the moving mass and the contact area, the contact life of the vacuum interrupter also faces a great test.

[0004] The information disclosed in the background art section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] Aiming at the deficiencies or defects existing in the prior art, a structure of a double-moving-contact vacuum circuit breaker and a control method thereof are provided. The double moving contacts provide more choices for the opening and closing modes of the circuit breaker. The circuit breaker alternately operates unilaterally on one side to open and close the normal current. The existence of the double moving contacts and the closing overtravel greatly slows down the closing collision rigidity and improves the mechanical life of the moving contact and each transmission part; the bilateral operation breaks the short-circuit current, enabling a higher contact breaking speed to be obtained at a lower moving speed, and improving the breaking capacity of the circuit breaker on the premise of ensuring the mechanical life of transmission components such as the pull rod.

[0006] The object of the present invention is achieved by the following technical solutions.

[0007] A structure of a double - acting contact vacuum circuit breaker driven by a double electromagnetic repulsion mechanism includes

[0008] A vacuum interrupter, which has a pair of first moving contacts and second moving contacts that act independently of each other;

[0009] A first electromagnetic repulsion mechanism, which is directly connected to the first moving contact through a first pull rod,

[0010] A second electromagnetic repulsion mechanism, which is directly connected to the second moving contact through a second pull rod. The double - acting contact vacuum circuit breaker structure opens and closes the normal current by the alternate single - side action of the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism.

[0011] In the double - acting contact vacuum circuit breaker structure, the first electromagnetic repulsion mechanism includes

[0012] A first main shaft,

[0013] A first electromagnetic repulsion disk, which is fixedly connected to the first main shaft,

[0014] A first opening coil, which is arranged on one side of the first electromagnetic repulsion disk and provides driving force for the first electromagnetic repulsion disk during opening,

[0015] A first closing coil, which is arranged on the other side of the first electromagnetic repulsion disk and provides driving force for the first electromagnetic repulsion disk during closing,

[0016] A first closing stop member, which is arranged on one side of the first tray. The first closing stop member is used for stopping during the closing process,

[0017] A first inductor, which is installed on the first closing stop member,

[0018] A first tray, which is fixedly connected to the first main shaft,

[0019] A first bistable spring, which connects the first tray and provides closing and opening holding forces for the first electromagnetic repulsion mechanism,

[0020] A first opening stop member, which is arranged on the other side of the first tray and is used for stopping during the opening process.

[0021] In the double - acting contact vacuum circuit breaker structure, the second electromagnetic repulsion mechanism includes

[0022] A second main shaft,

[0023] A second electromagnetic repulsion disk, which is fixedly connected to the second main shaft,

[0024] A second opening coil, which is arranged on one side of the second electromagnetic repulsion disk and provides driving force for the second electromagnetic repulsion disk during opening,

[0025] A second closing coil, which is arranged on the other side of the second electromagnetic repulsion disc and provides a driving force for the second electromagnetic repulsion disc during closing.

[0026] A second closing stopper, which is arranged on one side of the second tray and is used for stopping during the closing process.

[0027] A second inductor, which is installed on the second closing stopper.

[0028] A second tray, which is fixedly connected to the second main shaft.

[0029] A second bistable spring, which connects the second tray and provides closing and opening holding forces for the second electromagnetic repulsion mechanism.

[0030] A second opening stopper, which is arranged on the other side of the second tray and is used for stopping during the opening process.

[0031] In the structure of the double - acting contact vacuum circuit breaker, the first electromagnetic repulsion mechanism is located above the vacuum interrupter, and the second electromagnetic repulsion mechanism is located below the vacuum interrupter.

[0032] In the structure of the double - acting contact vacuum circuit breaker, the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism are symmetric with respect to the vacuum interrupter.

[0033] In the structure of the double - acting contact vacuum circuit breaker, the vacuum interrupter includes:

[0034] A housing;

[0035] A first moving contact, which includes:

[0036] A first moving conducting rod, which passes through the housing and is connected to the first pull rod.

[0037] A first contact seat, which is connected to the first moving conducting rod.

[0038] A first contact piece, which is connected to the first contact seat.

[0039] A second moving contact, which includes:

[0040] A second moving conducting rod, which passes through the housing and is connected to the second pull rod.

[0041] A second contact seat, which is connected to the second moving conducting rod.

[0042] A second contact piece, which is connected to the second contact seat and is opposite to the first contact piece.

[0043] In the described double-moving-contact vacuum circuit breaker structure, the housing includes an insulating porcelain shell and a shielding cover, and the first moving conductive rod or the second moving conductive rod is connected to the housing through a bellows or a sliding connection method.

[0044] In the described double-moving-contact vacuum circuit breaker structure, the first moving contact or the second moving contact includes a contact with an arcing horn, a flat contact, and a contact with transverse or longitudinal magnetic slots, and the central axes of the first moving contact and the second moving contact are collinear.

[0045] In the described double-moving-contact vacuum circuit breaker structure, when the double-moving-contact vacuum circuit breaker structure conducts current normally, the total distance between the first tray and the first closing stop member and the distance between the second tray and the second closing stop member is used as the closing overtravel.

[0046] The control method of the double-moving-contact vacuum circuit breaker structure driven by a double electromagnetic repulsion mechanism includes

[0047] When the double-moving-contact vacuum circuit breaker structure opens the normal operating current during the opening operation, only one of the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism is driven to perform the opening operation, while the other does not operate;

[0048] When the double-moving-contact vacuum circuit breaker structure closes the normal operating current during the closing operation, only one of the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism is driven to perform the opening operation, while the other does not operate;

[0049] When the double-moving-contact vacuum circuit breaker structure interrupts the fault current, the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism perform the opening operation simultaneously;

[0050] When the double-moving-contact vacuum circuit breaker structure is in the closing position and both the first inductor and the second inductor for closing detect contact, a warning is issued.

[0051] Compared with the prior art, the beneficial effects brought by the present invention are:

[0052] The present invention provides more options for the opening and closing modes of the circuit breaker through the double-moving contacts and the closing stop member. When breaking and closing the normal working current, the circuit breaker uses one or more sets of closing and opening as one round to make the double-moving contacts act separately in different rounds to break or close the normal current. This not only reduces the number of operations on one side, but also the existence of the double-moving contacts and the closing over-travel allows the two contacts to move in the same direction for a certain distance and then stop when closing, greatly reducing the collision rigidity during closing and improving the mechanical life of the moving contact and each transmission part. When breaking the fault current, the double-moving contacts of the circuit breaker simultaneously perform the opening action under the electromagnetic repulsion mechanism to quickly form the required opening distance. Under the same short-circuit breaking speed requirement, the driving speed required for the circuit breaker to break the normal working current and perform single-side opening is significantly reduced, reducing the stress on each transmission part during the opening action of the circuit breaker and improving the mechanical life of the transmission parts. At the same time, the present invention adds an inductor to the closing stop member, which can timely monitor faults such as contact wear of the circuit breaker, facilitating the condition monitoring of the circuit breaker.

[0053] The above description is only an overview of the technical solution of the present invention. In order to make the technical means of the present invention clearer and to the extent that those skilled in the art can implement it according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following takes the specific implementation manners of the present invention as examples for illustration. Brief Description of the Drawings

[0054] By reading the detailed description of the preferred specific implementation manners below, various other advantages and benefits of the present invention will become clear to those of ordinary skill in the art. The drawings in the specification are only for the purpose of showing the preferred implementation manners and are not considered as a limitation of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Moreover, throughout the drawings, the same reference numerals are used to represent the same components.

[0055] In the drawings:

[0056] Figure 1 is a schematic structural diagram of the symmetric closing position of the double-moving contacts in the present invention when passing normal current;

[0057] Figure 2 is a schematic structural diagram of the asymmetric closing position of the double-moving contacts in the present invention when passing normal current;

[0058] Figure 3 is a schematic structural diagram of the asymmetric closing position of the double-moving contacts in the present invention when passing normal current;

[0059] Figure 4This is a schematic structural diagram of the double-moving contact in the single-side opening position in the present invention;

[0060] Figure 5 This is a schematic structural diagram of the double-moving contact in the double-side opening position in the present invention;

[0061] Figure 6 This is a schematic structural diagram of the double-moving contact in the fault closing position in the present invention.

[0062] The following further explains the present invention in conjunction with the drawings and embodiments. Specific Embodiments

[0063] The specific embodiments of the present invention will be described in more detail below with reference to the drawings. Although the specific embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to be able to fully convey the scope of the present invention to those skilled in the art.

[0064] It should be noted that certain terms are used in the description and claims to refer to specific components. Those skilled in the art should understand that technicians may use different terms to refer to the same component. The description and claims of this specification do not use the difference in terms as a way to distinguish components, but use the difference in the functions of components as the criterion for distinction. For example, the term "comprising" or "including" mentioned throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to". The subsequent description of the specification is for the purpose of implementing the preferred embodiments of the present invention, but the description is based on the general principles of the specification and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the scope defined by the appended claims.

[0065] For the convenience of understanding the embodiments of the present invention, the following will further explain with several specific embodiments as examples in conjunction with the drawings, and each drawing does not constitute a limitation on the embodiments of the present invention.

[0066] For better understanding, as Figures 1 to 6 shown, a double-moving contact vacuum circuit breaker structure includes,

[0067] A vacuum interrupter, the vacuum interrupter having a pair of first moving contacts and second moving contacts that operate independently of each other;

[0068] A first electromagnetic repulsion mechanism, which is directly connected to the first moving contact through a first pull rod 10,

[0069] The second electromagnetic repulsion mechanism is directly connected to the second moving contact through the second pull rod 18. The double-moving-contact vacuum circuit breaker structure opens and closes the normal current by the alternating single-side actions of the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism.

[0070] In a preferred embodiment of the double-moving-contact vacuum circuit breaker structure, the first electromagnetic repulsion mechanism includes

[0071] A first main shaft 9

[0072] A first electromagnetic repulsion disc 7, which is fixedly connected to the first main shaft 9

[0073] A first opening coil 8, which is arranged on one side of the first electromagnetic repulsion disc 7 and provides a driving force for the first electromagnetic repulsion disc 7 during opening

[0074] A first closing coil 6, which is arranged on the other side of the first electromagnetic repulsion disc 7 and provides a driving force for the first electromagnetic repulsion disc 7 during closing

[0075] A first closing stop member 5, which is arranged on one side of the first tray 3 and is used for stopping during the closing process

[0076] A first inductor 4, which is installed on the first closing stop member 5

[0077] A first tray 3, which is fixedly connected to the first main shaft 9

[0078] A first bistable spring 2, which connects the first tray 3 and provides a closing and opening holding force for the first electromagnetic repulsion mechanism

[0079] A first opening stop member 1, which is arranged on the other side of the first tray 3 and is used for stopping during the opening process.

[0080] In a preferred embodiment of the double-moving-contact vacuum circuit breaker structure, the second electromagnetic repulsion mechanism includes

[0081] A second main shaft 19

[0082] A second electromagnetic repulsion disc 21, which is fixedly connected to the second main shaft 19

[0083] A second opening coil 20, which is arranged on one side of the second electromagnetic repulsion disc 21 and provides a driving force for the second electromagnetic repulsion disc 21 during opening

[0084] A second closing coil 22, which is arranged on the other side of the second electromagnetic repulsion disc 21 and provides a driving force for the second electromagnetic repulsion disc 21 during closing

[0085] The second closing stop member 23 is disposed on one side of the second tray 25, and the second closing stop member 23 is used for stopping during the closing process.

[0086] The second inductor 24 is mounted on the second closing stop member 23.

[0087] The second tray 25 is fixedly connected to the second main shaft 19.

[0088] The second bistable spring 26 is connected to the second tray 25 to provide closing and opening holding forces for the second electromagnetic repulsion mechanism.

[0089] The second opening stop member 27 is disposed on the other side of the second tray, and it is used for stopping during the opening process.

[0090] In a preferred embodiment of the double - acting contact vacuum circuit breaker structure, the first electromagnetic repulsion mechanism is located above the vacuum interrupter, and the second electromagnetic repulsion mechanism is located below the vacuum interrupter.

[0091] In a preferred embodiment of the double - acting contact vacuum circuit breaker structure, the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism are symmetric structures with respect to the vacuum interrupter.

[0092] In a preferred embodiment of the double - acting contact vacuum circuit breaker structure, the vacuum interrupter includes

[0093] A housing 11;

[0094] The first moving contact includes

[0095] The first moving conducting rod 12 passes through the housing 11 and is connected to the first pull rod 10.

[0096] The first contact seat 13 is connected to the first moving conducting rod 12.

[0097] The first contact piece 14 is connected to the first contact seat 13.

[0098] The second moving contact includes

[0099] The second moving conducting rod 17 passes through the housing 11 and is connected to the second pull rod 18.

[0100] The second contact seat 16 is connected to the second moving conducting rod 17.

[0101] The second contact piece 15 is connected to the second contact seat 16 and is opposite to the first contact piece 14.

[0102] In a preferred embodiment of the structure of the double-moving-contact vacuum circuit breaker, the housing 11 includes an insulating porcelain shell and a shielding cover, and the first moving conducting rod 12 or the second moving conducting rod 17 is connected to the housing 11 through a bellows or a sliding connection method.

[0103] In a preferred embodiment of the structure of the double-moving-contact vacuum circuit breaker, the first moving contact or the second moving contact includes a contact with an arcing horn, a flat contact, and a contact with transverse or longitudinal magnetic slots, and the central axes of the first moving contact and the second moving contact are collinear.

[0104] In a preferred embodiment of the structure of the double-moving-contact vacuum circuit breaker, when the double-moving-contact vacuum circuit breaker structure conducts current normally, the total distance between the first tray 3 and the first closing stop member 5 and the distance between the second tray 25 and the second closing stop member 23 is used as the closing overtravel.

[0105] The control method of the double-moving-contact vacuum circuit breaker structure includes,

[0106] When the double-moving-contact vacuum circuit breaker structure opens the normal operating current during the opening operation, only one of the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism is driven to perform the opening operation, while the other does not operate;

[0107] When the double-moving-contact vacuum circuit breaker structure closes the normal operating current during the closing operation, only one of the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism is driven to perform the closing operation, while the other does not operate;

[0108] When the double-moving-contact vacuum circuit breaker structure interrupts the fault current, the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism perform the opening operation simultaneously;

[0109] When the double-moving-contact vacuum circuit breaker structure is in the closed position and both the first inductor 4 and the second inductor 24 for closing detect contact, a warning is issued.

[0110] In one embodiment, the double-moving-contact vacuum circuit breaker structure includes a vacuum interrupter with double moving contacts. The vacuum interrupter has a pair of moving contacts that can operate independently. The first moving conducting rod 12, the first contact seat 13, and the first contact piece 14 form the first moving contact on the upper side, and the second moving conducting rod 17, the second contact seat 16, and the second contact piece 15 form the second moving contact on the lower side;

[0111] Two electromagnetic repulsion mechanisms, the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism are directly connected to the moving conductive rod 12 of the first moving contact and the second moving conductive rod 17 of the second moving contact through the first pull rod 10 and the second pull rod 18 respectively. The first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism respectively have a first main shaft 9 and a second main shaft 19, a first electromagnetic repulsion disk 7 and a second electromagnetic repulsion disk 21 fixedly connected to the first main shaft 9 and the second main shaft 19, a first tray 3 respectively connecting the first main shaft 9 and the first bistable spring 2, a second tray 25 respectively connecting the second main shaft 19 and the second bistable spring 26, and a first opening coil 8 and a second opening coil 20, a first opening stop 1 and a second opening stop 27, a first closing coil 6 and a second closing coil 22, a first closing stop 5 and a second closing stop 23, a first sensor 4 installed on the first closing stop 5, a second sensor 24 installed on the second closing stop 23, and fixed components such as an opening / closing buffer.

[0112] In one embodiment, the first tie rod 10 and the second tie rod 18 are insulating tie rods or metal tie rods.

[0113] When the circuit breaker conducts current normally, its structural diagram is as follows: Figures 1 to 3 As shown, the first contact piece 14 and the second contact piece 15 are in close contact under the action of the first bistable spring 2 and the second bistable spring 26. At this time, due to the different mechanism designs and usage conditions, two situations may occur. One is: Figure 1 In the symmetrical closing situation shown in the figure, the first tray 3 and the second tray 25 on both sides cannot touch the first closing stopper 5, the second closing stopper 23 and the first sensor 4 and the second sensor 24 thereon; second: Figure 2 or Figure 3 The asymmetric closing situation shown is: the second tray 25 on one side is pressed on the second closing stop 23 by the action of the second bistable spring 26, at which time the second closing sensor 24 on this side is sensed, and the first tray 3 on the other side does not contact the first closing stop 5 and the first sensor 4 thereon; or the first tray 3 on one side is pressed on the first closing stop 5 by the action of the first bistable spring 2, at which time the first closing sensor 4 on this side is sensed, and the second tray 25 on the other side does not contact the second closing stop 23 and the second sensor 24 thereon. Figures 1 to 3 In the two cases shown, the sum of the distance from the second tray 25 to the second closing stopper 23 on the same side and the distance from the first tray 3 to the first closing stopper 5 on the same side is called closing overtravel.

[0114] When the circuit breaker is in the open position after breaking the normal current, taking the action of the first moving contact on the upper side as an example, its structural diagram is as follows Figure 4As shown, the first moving contact on its upper side is in the open position while the second moving contact on its lower side is in the closed position. The first tray 3 of the first electromagnetic repulsion mechanism on the open side is pressed against the first open position stop 1 under the action of the first bistable spring 2, and the second tray 25 of the second electromagnetic repulsion mechanism on the closing side is pressed against the second closing position stop 23 under the action of the second bistable spring 26. At this time, the second inductor 24 on the second closing position stop on the closing side has an induction, and there is a certain gap between the first contact piece 14 and the second contact piece 15.

[0115] When the circuit breaker is in the fault open position, its structural schematic diagram is as Figure 5 shown. The first tray 3 and the second tray 25 of the electromagnetic repulsion mechanisms on both sides are respectively pressed against the first open position stop 1 and the second open position stop 27 under the action of the first bistable spring 2 and the second bistable spring 26.

[0116] When the circuit breaker is in the fault closed position, its structural schematic diagram is as Figure 6 shown. The first tray 3 and the second tray 25 of the electromagnetic repulsion mechanisms on both sides are both pressed against the first closing position stop 5 and the second closing position stop 23 under the action of the first bistable spring 2 and the second bistable spring 26. At this time, the first inductor 4 and the second inductor 24 on both sides during closing both have an induction.

[0117] During the normal operation of the circuit breaker, the springs in the first bistable spring 2 and the second bistable spring 26 are always in a compressed state.

[0118] When the circuit breaker breaks and closes normal current, taking the example of only the first moving contact on the upper side acting: When the circuit breaker performs an open operation to break the normal working current, only the first electromagnetic repulsion mechanism on the upper side is driven to perform an open operation while the second electromagnetic repulsion mechanism on the other side does not act. Its structure changes from Figure 1 / Figure 2 / Figure 3 to Figure 4 ; When the circuit breaker performs a closing operation to close the normal working current, only the first electromagnetic repulsion mechanism on the upper side is driven to perform a closing operation while the second electromagnetic repulsion mechanism on the other side does not act. Its structure changes from Figure 4 to Figure 1 / Figure 2 / Figure 3 . And after the first electromagnetic repulsion mechanism on the upper side performs one or more rounds of opening and closing, the next round can be performed by the second electromagnetic repulsion mechanism on the other side; This design reduces the number of operations on one side. At the same time, the existence of the double moving contacts and the closing overtravel enables the two contacts to move a certain distance in the same direction and then stop when colliding during closing, greatly reducing the collision rigidity during closing and improving the mechanical life of the moving contact and each transmission part, especially the pull rod.

[0119] When the circuit breaker needs to operate quickly to interrupt the fault current, the mechanisms on both sides operate simultaneously to trip, ensuring that a sufficient opening distance is formed as soon as possible between the two moving contacts. Its structure consists of Figure 1 / Figure 2 / Figure 3 becomes Figure 5 . Under the same short - circuit breaking speed requirement, when the present invention interrupts the normal operating current with single - side tripping, the required driving speed is significantly reduced, reducing the stress on each transmission part of the circuit breaker during the tripping operation and improving the mechanical life of the transmission parts;

[0120] When the circuit breaker is in Figure 6 this fault closing position, when the first sensors 4 on the first closing stop members 5 and the second sensors 24 on the second closing stop members 23 on both sides detect contact, a warning is issued, indicating that the equipment needs maintenance. This solution can timely monitor faults such as contact wear of the circuit breaker, facilitating the condition monitoring of the circuit breaker.

[0121] The first electromagnetic repulsion mechanism drives the moving contact to perform closing and tripping operations through electromagnetic force, ensuring fast and reliable switching actions. The design of the bistable spring provides stable closing and tripping holding forces, enabling the mechanism to be stably held in the closing and tripping positions respectively. Similar to the first electromagnetic repulsion mechanism, the second electromagnetic repulsion mechanism also drives the moving contact to perform closing and tripping operations through electromagnetic force and provides a stable holding force through the bistable spring. This symmetrical design ensures the operation consistency of the contacts on both sides and improves the overall performance. The housing provides necessary insulation protection, while the moving contact and its components ensure effective conduction and disconnection of the current. The design of the moving contact considers different forms such as arcing horns and flat contacts to adapt to different application scenarios.

[0122] In the control method,

[0123] Tripping operation: Only drive one of the first electromagnetic repulsion mechanism or the second electromagnetic repulsion mechanism to perform the tripping operation, while the other does not operate.

[0124] This single - side operation mode reduces mechanical stress and extends the equipment life.

[0125] Closing operation: Only drive one electromagnetic repulsion mechanism in the tripped state to perform the closing operation, while the other does not operate.

[0126] Single - side closing can reduce the rigidity of contact collision and the risk of wear.

[0127] Fault current interruption: The first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism trip simultaneously.

[0128] In case of a fault, simultaneous operation can quickly form a sufficient opening distance to ensure rapid interruption of the short - circuit current.

[0129] Fault detection: When in the closing position, if both the first inductor 4 and the second inductor 24 detect contact, a warning is issued.

[0130] This monitoring mechanism can promptly detect contact wear or other faults, facilitating maintenance and repair.

[0131] The first moving contact includes a first moving conductive rod 12, a first contact seat 13, and a first contact piece 14; the second moving contact includes a second moving conductive rod 17, a second contact seat 16, and a second contact piece 15. These components work together to ensure that current can be effectively transmitted between the contacts and improve the reliability and safety of the system through independent operations.

[0132] Symmetrical layout of the first electromagnetic repulsive force mechanism and the second electromagnetic repulsive force mechanism. The first electromagnetic repulsive force mechanism is located above the vacuum interrupter, and the second electromagnetic repulsive force mechanism is located below the vacuum interrupter. The two are symmetrically structured with respect to the vacuum interrupter. The symmetrical layout ensures the consistency and balance of the actions of the contacts on both sides, improving the overall performance.

[0133] The first inductor 4 is installed on the first closing stop 5, and the second inductor 24 is installed on the second closing stop 23 for monitoring the state of the contacts. The inductor can monitor in real time and promptly detect faults such as contact wear of the circuit breaker, facilitating the state monitoring of the circuit breaker and helping to promptly discover potential problems and take measures.

[0134] The basic principles of the present application have been described in combination with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. Additionally, the specific details disclosed above are only for illustrative and facilitating understanding purposes and are not limitations. The above details do not limit the present application to necessarily adopting the above specific details for implementation.

[0135] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the form disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub - combinations thereof.

Claims

1. A structure of a double-moving-contact vacuum circuit breaker driven by a double-electromagnetic repulsion mechanism, characterized in that It includes a vacuum interrupter having a pair of first moving contacts and second moving contacts that act independently of each other; a first electromagnetic repulsion mechanism directly connected to the first moving contact through a first pull rod, a second electromagnetic repulsion mechanism directly connected to the second moving contact through a second pull rod. The double-moving-contact vacuum circuit breaker structure opens and closes the normal current by the alternating single-sided actions of the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism.

2. The structure of the double-moving-contact vacuum circuit breaker driven by the double-electromagnetic repulsion mechanism according to claim 1, characterized in that, Preferably, the first electromagnetic repulsion mechanism includes a first main shaft, a first electromagnetic repulsion disk fixedly connected to the first main shaft, a first opening coil provided on one side of the first electromagnetic repulsion disk to provide a driving force for the first electromagnetic repulsion disk during opening, a first closing coil provided on the other side of the first electromagnetic repulsion disk to provide a driving force for the first electromagnetic repulsion disk during closing, a first closing stop provided on one side of the first tray, and the first closing stop is used for stopping during the closing process, a first inductor installed on the first closing stop, a first tray fixedly connected to the first main shaft, a first bistable spring connecting the first tray to provide opening and closing holding forces for the first electromagnetic repulsion mechanism, a first opening stop provided on the other side of the first tray, and it is used for stopping during the opening process.

3. The structure of the double-moving-contact vacuum circuit breaker driven by the double-electromagnetic repulsion mechanism according to claim 2, wherein, The second electromagnetic repulsion mechanism includes a second main shaft, a second electromagnetic repulsion disk fixedly connected to the second main shaft, a second opening coil provided on one side of the second electromagnetic repulsion disk to provide a driving force for the second electromagnetic repulsion disk during opening, a second closing coil provided on the other side of the second electromagnetic repulsion disk to provide a driving force for the second electromagnetic repulsion disk during closing, a second closing stop provided on one side of the second tray, and the second closing stop is used for stopping during the closing process, a second inductor installed on the second closing stop, a second tray fixedly connected to the second main shaft, a second bistable spring connecting the second tray to provide opening and closing holding forces for the second electromagnetic repulsion mechanism, a second opening stop provided on the other side of the second tray, and it is used for stopping during the opening process.

4. The structure of the double-moving-contact vacuum circuit breaker driven by the double-electromagnetic repulsion mechanism according to claim 1, wherein, The first electromagnetic repulsion mechanism is located on the upper side of the vacuum interrupter, and the second electromagnetic repulsion mechanism is located on the lower side of the vacuum interrupter.

5. The structure of the double-moving-contact vacuum circuit breaker driven by a double-electromagnetic repulsion mechanism according to claim 1, characterized in that, The first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism are symmetric structures with respect to the vacuum interrupter.

6. The structure of the double-acting contact vacuum circuit breaker driven by the double electromagnetic repulsion mechanism according to claim 1, characterized in that, The vacuum interrupter includes a housing; the first moving contact, which includes a first moving conducting rod passing through the housing and connecting the first pull rod, a first contact seat connecting the first moving conducting rod, a first contact piece connecting the first contact seat, the second moving contact, which includes a second moving conducting rod passing through the housing and connecting the second pull rod, a second contact seat connecting the second moving conducting rod, a second contact piece connecting the second contact seat and opposite to the first contact piece.

7. The structure of the double-moving-contact vacuum circuit breaker driven by the double-electromagnetic repulsion mechanism as claimed in claim 6, wherein The housing includes an insulating porcelain shell and a shielding cover, and the first moving conducting rod or the second moving conducting rod is connected to the housing by a bellows or a sliding connection method.

8. The structure of the double-moving-contact vacuum circuit breaker driven by the double electromagnetic repulsion mechanism according to claim 1, characterized in that, The first moving contact or the second moving contact includes an arcing angle contact, a flat contact, and a contact with transverse or longitudinal magnetic slots. The central axes of the first moving contact and the second moving contact are collinear.

9. The structure of the double-acting contact vacuum circuit breaker driven by the double electromagnetic repulsion mechanism according to claim 1, characterized in that, When the double moving contact vacuum circuit breaker structure conducts current normally, the total distance between the first tray and the first closing stop member and the distance between the second tray and the second closing stop member is used as the closing overtravel.

10. The control method of the double moving contact vacuum circuit breaker structure driven by a double electromagnetic repulsion mechanism according to any one of claims 1-9.

Images