Intelligent circuit breaker on-off structure and intelligent circuit breaker

Abstract

The invention discloses an intelligent circuit breaker on-off structure and an intelligent circuit breaker, and relates to the technical field of power grid protection equipment.The on-off structure comprises a conducting rod, the conducting rod comprises a first rod body and a second rod body, each of the first rod body and the second rod body is provided with a contact matched with the other rod body, and the on-off structure further comprises a driving mechanism; the driving mechanism is an electromagnetic driver comprising a shell, a movable iron core and an electromagnetic coil, permanent magnet modules are arranged at the two ends of the electromagnetic coil, and each permanent magnet module comprises a first permanent magnet and a second permanent magnet; according to any permanent magnet module, a first permanent magnet is fixed to a shell, and a second permanent magnet is fixed to a second rod body; the movable iron core is fixed on the second rod body, the circuit breaker comprises the on-off mechanism, and the structure provided by the scheme has the characteristics of being simple in structure, high in reliability and favorable for simplifying energy supply design.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid protection equipment, and in particular to an intelligent circuit breaker on-off structure and an intelligent circuit breaker. Background Art

[0002] Medium voltage fuses are the most commonly used protection devices in 3~35kV distribution lines. The core components of existing fuses include fuses (fuse wires). Their working principle is that when the current in the line is greater than the rated current, the circuit is cut off by physically blowing the fuse wire to provide protection for the line. In this way, after each time the fuse triggers the fuse protection action, it is necessary to manually remove the fuse tube on site for recovery, and then replace the fuse wire again. The line function can be restored after closing the circuit. In use, the advantages of fuses are good selectivity, strong breaking capacity, small size, and low price. The disadvantages are that the fuse recovery time is long, and the melting time is greatly affected by the ambient temperature and current size. After the single-phase is cut off, it may cause adverse effects on the distribution network equipment and power equipment. Therefore, conventional fuses may have problems such as slow protection action on the distribution line, serious arcing, inability to remotely alarm and remotely control, and inability to remotely read parameters.

[0003] In order to solve the problem of the single line cutting method of conventional fuses, a drop-out fuse with an actuator has appeared in the prior art. In such a scheme, the fuse tube is triggered to operate by the actuator, so that the upper end of the fuse tube is separated from the static contact at the upper end of the fuse, thereby realizing the disconnection of the distribution line. The specific scheme is the technical scheme provided in the patent application documents with patent application numbers CN202310917008.3 and CN202410806378.4; in addition, there is also a technical scheme in the prior art that acts on the melt in a shearing manner, and after the melt is shortened, the distribution line is disconnected, such as the technical scheme provided in the patent application document with patent application number CN202311629206.6.

[0004] In order to achieve the purpose of short circuit and overload protection of distribution lines, circuit breakers are another important protection device different from fuses. The working principle of circuit breakers is different from that of fuses: the circuit breaker provides protection by using a tripping action to cut off the circuit, and can quickly restore normal power supply through a closing action after the fault is eliminated. At the same time, the circuit breaker also has the characteristics of fast action speed and reusability. The circuit breakers in the prior art include technical solutions provided in patent documents such as patent application numbers CN201410386519.8 and CN201910329667.9.

[0005] The protection equipment of distribution lines is an important equipment for protecting the safety of power-consuming equipment, distribution equipment and personnel in the power grid. In order to improve the flexibility and reliability of the protection equipment, it is necessary to further study the relevant technologies. Summary of the invention

[0006] In view of the above-mentioned problem of further studying the distribution line protection equipment, the present invention provides an intelligent circuit breaker on-off structure and an intelligent circuit breaker. The on-off structure is a component of the circuit breaker, and the structure provided by the scheme has the characteristics of simple structure, high reliability and being beneficial to simplifying the energy supply design.

[0007] In view of the above problems, the present invention provides an intelligent circuit breaker on-off structure and an intelligent circuit breaker to solve the problems through the following technical points: an intelligent circuit breaker on-off structure, comprising a conductive rod for realizing the conduction of a distribution line, the conductive rod comprising a first rod body and a second rod body arranged opposite to each other, each of the first rod body and the second rod body is provided with a contact matched with the other, and also comprises a driving mechanism for changing the matching state of the contacts, the driving mechanism is an electromagnetic driver including a housing, a moving iron core and an electromagnetic coil, both ends of the electromagnetic coil are provided with permanent magnet modules, each permanent magnet module comprises a first permanent magnet and a second permanent magnet; Any permanent magnet module is: the first permanent magnet is fixed on the shell, and the second permanent magnet is fixed on the second rod; The moving iron core is fixed on the second rod body; When the first permanent magnet and the second permanent magnet on the permanent magnet module at one end of the electromagnetic coil attract each other, the first permanent magnet and the second permanent magnet on the permanent magnet module at the other end of the electromagnetic coil maintain a distanced state with a maximum distance; When the first permanent magnet and the second permanent magnet on the permanent magnet module close to the first rod body are attracted to each other, the contacts cooperate with each other to be in a path contact state; when the first permanent magnet and the second permanent magnet on the permanent magnet module far from the first rod body are attracted to each other, the contacts cooperate with each other to be in a circuit breaker isolation state.

[0008] When the present solution is used, as a component of the contact mechanism of the circuit breaker, specifically, the contacts of the first rod body and the second rod body are both used as contacts for passing the load current, the first rod body and the second rod body can both be made of copper rods, and the contacts are silver-based alloys or other metals with low contact resistance arranged on the corresponding rod bodies, and as an operating mechanism of the circuit breaker, specifically, the electromagnetic coil changes the position of the second rod body through the moving iron core after being energized, when the electromagnetic coil drives the second rod body to move toward the side where the first rod body is located through the moving iron core, the two contacts contact each other and cooperate with each other to form a path contact state, the conductive rod is turned on, and when the electromagnetic coil drives the second rod body to move away from the first rod body through the moving iron core When one side of the body moves, the two contacts separate and cooperate with each other to form a circuit-breaking and isolating state, and the conductive rod is disconnected. The specific application is that after being installed on the circuit breaker, the end of the first rod body away from the contact thereon contacts and presses the contact plate, and the end of the second rod body away from the contact thereon contacts and presses the bottom plate. At the same time, the contact plate is electrically connected to the power supply side through a cable, and the bottom plate is electrically connected to the user side through a cable. When the conductive rod is in a state of contact with each other (closing state) where the contacts cooperate with each other to form a path contact, the circuit breaker is in a state of conducting the line; when the conductive rod is in a state of contact with each other (opening state) where the contacts cooperate with each other to form a circuit-breaking and isolating state, the circuit breaker is in a state of cutting off the line.

[0009] As a switch structure based on electromagnetic drive, this solution is different from the prior art and is configured to include an electromagnetic coil, a moving iron core and a permanent magnet module. Specifically, the moving iron core is installed on the second rod body, and permanent magnet modules are arranged at both ends of the electromagnetic coil. In this way, when it is necessary to switch from the open state to the closed state, it is only necessary to energize the electromagnetic coil, so that the moving iron core provides the second rod body with a force to move the second rod body toward the first rod body under the action of the electromagnetic coil. In this process, the second permanent magnet fixed on the second rod body moves synchronously with the second rod body. For the permanent magnet module on the side of the electromagnetic coil close to the first rod body, The distance between the second permanent magnet and the first permanent magnet is reduced, and the magnetic force between the second permanent magnet and the first permanent magnet continues to increase. For the permanent magnet module on the side of the electromagnetic coil away from the first rod body, the distance between the second permanent magnet and the first permanent magnet increases, and the magnetic force between the second permanent magnet and the first permanent magnet continues to decrease. When the contacts of the above two are in contact, the first permanent magnet and the second permanent magnet on the permanent magnet module on the side of the electromagnetic coil close to the first rod body are in a state of mutual attraction, and the first permanent magnet and the second permanent magnet on the other permanent magnet module are in a state of maximum distance away. At this time, after the power supply of the electromagnetic coil is disconnected, the above two The contacts of the first and second rods are maintained in contact under the action of the permanent magnet module on the side of the electromagnetic coil close to the first rod body. Conversely, when it is necessary to switch from the closed state to the open state, it is only necessary to energize the electromagnetic coil, so that the moving iron core provides the second rod body with a force to separate and move away from the first rod body under the action of the electromagnetic coil. In this process, the second permanent magnet fixed on the second rod body moves synchronously with the second rod body. For the permanent magnet module on the side of the electromagnetic coil close to the first rod body, the distance between the second permanent magnet and the first permanent magnet increases, and the magnetic force between the second permanent magnet and the first permanent magnet continues to decrease. For the permanent magnet module on the side of the electromagnetic coil far away When the permanent magnet module is away from the first rod side, the distance between the second permanent magnet and the first permanent magnet decreases, and the magnetic force between the second permanent magnet and the first permanent magnet continues to increase. When the contacts of the above two are out of contact and maintain the set disconnection distance, the first permanent magnet and the second permanent magnet on the permanent magnet module on the side of the electromagnetic coil away from the first rod are in a mutually attracted state, and the first permanent magnet and the second permanent magnet on the other permanent magnet module are in a state of being separated by the maximum distance. At this time, after the power supply of the electromagnetic coil is disconnected, the contacts of the above two are maintained in a spaced state under the action of the permanent magnet module on the side of the electromagnetic coil away from the first rod.

[0010] In summary, in the process of switching between the open state and the closed state, this scheme only needs to provide electric energy for the electromagnetic coil of the electromagnetic driver for a short time. After completing the switching between the open state and the closed state, the permanent magnet module can be used to maintain the current state of the conductive rod. From the perspective of energy supply, this scheme does not need to provide continuous power supply for the electromagnetic coil, and consumes less energy during operation, so it is suitable for using an energy-taking transformer (energy-taking CT) to provide energy supply for its operation; the two state locking of the conductive rod in this scheme can be achieved by using the corresponding permanent magnet module, which is different from the implementation methods of spring energy storage, latch locking, etc. This scheme is not only simple in structure, but also its state switching can be completed based on the electromagnetic coil, and does not need to rely on manual recovery; the two state switching and locking of the conductive rod in this scheme can be achieved by using the corresponding permanent magnet module and the basic electromagnetic drive mechanism, which is different from the implementation methods of repulsion mechanism, limit mechanism, etc. This scheme has a simple structure and does not need to be configured with other transmission mechanisms for state switching and state locking, so this scheme also has the characteristics of high reliability.

[0011] As a person skilled in the art, it is easy to understand that when the contacts on the above two contacts are in contact with each other, the first rod body and the second rod body of the conductive rod remain in an electrically connected state, and when the contacts on the two contacts are separated from each other by a set distance, the first rod body and the second rod body of the conductive rod remain in an electrically disconnected state. The set distance has different minimum distances depending on the specific application. For example, when the on-off structure is used for the contact to be set in a vacuum tube and connected in series on a 10KV medium voltage line, the minimum value of the set distance can be set to 9mm. At the same time, the mutual attraction state is not limited to the state where the first permanent magnet is in direct contact with the second permanent magnet, but also includes the state where the first permanent magnet is spaced apart from the second permanent magnet. For example, when the magnetic force determined by the distance between the first permanent magnet and the second permanent magnet on one of the permanent magnet modules can maintain the position of the second rod body and the first rod body, and the magnetic force determined by the distance between the first permanent magnet and the second permanent magnet on the other permanent magnet module does not affect the position of the second rod body and the first rod body, and the second rod body is in a stationary state relative to the first rod body, it can be considered that the first permanent magnet and the second permanent magnet on one of the permanent magnet modules are mutually attracted, and the first permanent magnet and the second permanent magnet on the other permanent magnet module maintain a distanced state with a maximum distance.

[0012] At the same time, this solution sets the operating mechanism of the circuit breaker to include the above-mentioned drive mechanism and permanent magnet module. From the volume of the on-off structure, it is only necessary to configure the permanent magnet module on both sides of the electromagnetic coil, and its axial and radial volumes are small. Without changing the installation basis and being compatible with the existing installation basis and installation tools, it is used to replace the fuse device on the existing fuse, and replace the fuse based on passive protection on the line with a circuit breaker based on active protection, so as to solve the problem of needing on-site maintenance to restore the fuse and frequently replacing the fuse according to changes in load, etc. On the other hand, after using this solution to replace the fuse device on the existing fuse, since the protection provided to the power grid is active protection, if one of the three phases in the line is disconnected due to a fault, the disconnection information can be synchronized to the other two phases provided with this solution based on the short-distance wireless communication module and the long-distance communication module (such as a cellular mobile communication module) configured for the drive mechanism. The other two phases choose to act or not act according to the configuration and the current operating conditions, and the function of disconnecting or closing the three phases together is realized when necessary.

[0013] For the technical solution of configuring a control module for the drive mechanism, it can be specifically used as follows: the sensor CT (detection transformer) inputs the transformed current into the control module, the control module converts the analog signal into a digital signal, and then calculates the current value of the collected signal. If the current value exceeds the set opening current value, the inverse time curve is used to calculate the remaining action time and report the situation to the master station / superior. After waiting for the remaining action time to return to zero, if there is no signal from the master station / superior to keep the closing state, the control module controls the drive mechanism to move the state of the conductive rod from the closed closing state to the open opening state, and records and reports the action situation to the master station / superior. It is easy to understand that this solution can also be used in other control strategies, such as immediately executing the opening action when the current value exceeds the set opening current value.

[0014] As a further technical solution of the on-off structure of the intelligent circuit breaker: Also included is a vacuum tube, wherein the contacts are all located in the inner space of the vacuum tube; The first rod is fixed on the vacuum tube, and the second rod is connected to the vacuum tube through a deformable mechanism. The vacuum tube and the deformable mechanism form a vacuum installation environment for the contact, and the deformable mechanism is a metal bellows or a diaphragm-type elastic metal plate; When the driving mechanism drives the second rod to move, the deformable mechanism undergoes elastic deformation.

[0015] The above scheme proposes a technical scheme based on a vacuum environment formed by a vacuum tube and a deformable mechanism, and using the vacuum environment as a vacuum installation environment for the contact. Specifically, a vacuum switch is formed on the on-off structure to shorten the arc time when the line is disconnected, improve the pressure bearing capacity and breaking capacity, and ensure the service life and reliability. It is easy to understand that the metal bellows or diaphragm-type elastic metal plate adapts to the action of the second rod body by deformation. At the same time, the metal bellows or diaphragm-type elastic metal plate is a specific selection of the deformable mechanism on the vacuum tube. Different from other deformable mechanisms, the radial constraint that the metal bellows or diaphragm-type elastic metal plate can provide for the second rod body can ensure the matching quality when the above contacts are in contact.

[0016] The first rod body and the second rod body are both connected with a flexible connection structure, and the flexible connection structure is: a conductive structure that can generate elastic deformation in the length direction of the conductive rod.

[0017] In the above scheme, the flexible connection structure makes the lengths of the first rod and the second rod adjustable. If the scheme is applied to a circuit breaker, the circuit breaker includes a fixed base, a top plate connected to one end of the fixed base, and a bottom plate connected to the other end of the fixed base, and the top plate is provided with a contact plate elastically supported on the top plate. The scheme also includes assembling the scheme into an outer shell of an integral structure, the second rod is connected to the outer shell through a driving mechanism, the shell is fixed to the outer shell, and the first rod is connected to the outer shell; the outer shell is supported between the bottom plate and the contact plate: one end of the outer shell is supported on the bottom plate, the first rod extends from the outer shell and is supported on the contact plate, the second rod is electrically connected to the bottom plate, and the first rod is electrically connected to the contact plate. For the second rod, the flexible connection structure is used to adapt to the position change of the second rod to maintain the second rod with stable electrical connection performance with the bottom plate in any state, which is practical. For example, in the opening operation under the condition of a driving mechanism failure, the outer shell is also provided with a pull ring assembly for manually changing the configuration state of the scheme on the circuit breaker. The pull ring assembly is pulled by an insulating rod to remove the contact state between the first rod body and the contact plate. When the first rod body is provided with a flexible connection structure, during the process of the scheme being embedded between the contact plate and the bottom plate, the flexible connection structure on the first rod body changes the length of the scheme through elastic compression, which facilitates the embedding of the scheme between the contact plate and the bottom plate, and at the same time reduces the force on the vacuum tube in this process (the vacuum tube is mostly made of ceramic material), thereby achieving the purpose of protecting the vacuum tube. On the other hand, the flexible connection structure on the second rod body not only makes the second rod body relatively free to move, but also, when the second rod body is used to perform opening or closing, the flexible connection structure on the second rod body can reduce the impact on the vacuum tube during the movement of the second rod body by absorbing energy, thereby achieving the purpose of protecting the vacuum tube.

[0018] The flexible connection structure includes a first connection seat, a flexible cable, a second connection seat and an elastic member; The flexible cable is a flexible multi-strand cable, one end of the flexible cable is fixedly connected to the first connection seat, and the other end of the flexible cable is fixedly connected to the second connection seat; The flexible connection structure on the first rod body is connected in series to the first rod body: for the first rod bodies on both sides of the flexible connection structure, the first connection seat is fixedly connected to the first rod body on one side, and the second connection seat is fixedly connected to the first rod body on the other side, and the elastic member is supported and fixed between the first rod bodies on both sides; The flexible connection structure on the second rod is arranged at one end of the second rod away from the first rod, wherein the first connection seat is fixedly connected to the end of the second rod, the second connection seat is fixedly connected to the base, and the elastic member is supported between the second rod and the base.

[0019] The above scheme provides a flexible connection structure with good elasticity. Specifically, the flexible cable and the elastic member serve as the flexible part of the flexible connection structure, the first connection seat and the second connection seat serve as the connection seat for installation on the flexible connection structure, the first connection seat and the second connection seat can adopt metal rings with low electrical conductivity such as copper rings or silver-based alloy rings, when used on the first rod body, the first connection seat and the second connection seat can adopt a fixing scheme that is welded on the corresponding first rod body, when used on the second rod body, the first connection seat and the end of the second rod body are fixedly connected by welding, and the second connection seat is fixedly connected to the base by welding. When used on the circuit breaker, the base is supported on the bottom plate, so that the flexible cable is connected to the circuit breaker through the flexible cable. The flexible connection structure on the first rod body is flexible and deformable, and the elastic member adapts to the relative position of the first connecting seat and the second connecting seat through elastic deformation. For the flexible connection structure on the first rod body, after the scheme is installed on the circuit breaker, the elastic member is in a compressed deformation state. During the installation of the scheme on the circuit breaker, the elastic member is convenient for the installation of the scheme and protects the vacuum tube by undergoing a larger compression deformation. For the flexible connection structure on the second rod body, after the scheme is installed on the circuit breaker, when the contact is in the open state, the elastic member is in a compressed deformation state. When the contact is in the closed state, the elastic member is in a free state or a tensile deformation state that can maintain the contact quality between the base and the bottom plate, preferably a tensile deformation state, so as to reduce the impact of the closing action on the contacts and the vacuum tube by storing energy.

[0020] The flexible connection structure includes a first connection seat, a stack, and a second connection seat. The stack includes a plurality of stacked conductive sheets, and the conductive sheets are arc-shaped bent metal sheets. One end of the stack is fixedly connected to the first connection seat, and the other end of the stack is fixedly connected to the second connection seat. The flexible connection structure on the first rod body is connected in series with the first rod body: for the first rod bodies on both sides of the flexible connection structure, the first connection seat is fixedly connected to the first rod body on one side, and the second connection seat is fixedly connected to the first rod body on the other side; The flexible connection structure on the second rod body is arranged at an end of the second rod body away from the first rod body, wherein the first connection seat is fixedly connected to the end of the second rod body, and the second connection seat is fixedly connected to the base.

[0021] In parallel with the above, the above scheme provides a flexible connection structure with good elasticity. Specifically, the stack serves as a flexible structure and an elastic structure on the flexible connection structure. The first connection seat and the second connection seat serve as connection seats for installation on the flexible connection structure. The first connection seat and the second connection seat can adopt metal rings with low electrical conductivity such as copper rings or silver-based alloy rings. When used on the first rod body, the first connection seat and the second connection seat can adopt a fixing scheme that is welded on the corresponding first rod body. When used on the second rod body, the first connection seat and the end of the second rod body are fixedly connected by welding, and the second connection seat is fixedly connected to the base by welding. When used on the circuit breaker, the base is supported on the bottom plate. In this way, the stack adapts to the relative positions of the first connecting seat and the second connecting seat by deformation. For the flexible connection structure on the first rod body, after the present solution is installed on the circuit breaker, the stack is in a compressive deformation state. During the installation of the present solution on the circuit breaker, the stack is convenient for the installation of the present solution and protects the vacuum tube by undergoing a larger compressive deformation. For the flexible connection structure on the second rod body, after the present solution is installed on the circuit breaker, when the contact is in the open state, the stack is in a compressive deformation state. When the contact is in the closed state, the stack is in a free state or a tensile deformation state capable of maintaining the contact quality between the base and the bottom plate, preferably a tensile deformation state, so as to reduce the impact of the closing action on the contact and the vacuum tube by storing energy.

[0022] In the above two schemes, the end of the flexible cable and the end of the stack are welded to the first connecting seat and the second connecting seat, or the end of the flexible cable and the end of the stack are encapsulated in the first connecting seat and the second connecting seat. The elastic member can use a coil spring, and the conductive sheet of the stack can adopt an ellipsoidal thin shell structure. The arc bend thereon can enable it to have stable elastic properties, deformation properties and the ability to maintain the second rod body in its radial position.

[0023] It also includes a control module for controlling the driving mechanism, and a detection transformer for sampling the current on the conductive rod, wherein the detection transformer is connected to the control module by signal; The control module controls the driving mechanism in the following manner: the control module collects the detection result of the detection transformer and compares the detection result with the set current threshold value. When it is determined that the current on the lower conductive rod is less than the set current threshold value, the driving mechanism maintains the current path contact state of the contact; when it is determined that the current on the lower conductive rod is greater than or equal to the set current threshold value, the electromagnetic coil drives the second rod body to move through the moving iron core, and moves so that the contacts cooperate with each other to be in a circuit-breaking isolation state.

[0024] In this solution, the control module is used to control the drive mechanism, specifically, to control the electromagnetic coil. The detection transformer is used to collect the current on the conductive rod. The collection position can be located on the first rod body or on the second rod body. In order to optimize the weight of this solution and improve its installation stability, the control module, the drive mechanism, the detection transformer and the following energy-taking transformer are all arranged on the bottom side of the second rod body. In this solution, the detection result of the detection transformer is used as the input signal of the control module. When the control module determines that the current on the conductive rod is less than the set current threshold, the drive mechanism maintains the current contact state of the contact, that is, maintains the current closed state; when it is determined that the current on the conductive rod is greater than or equal to the set current threshold, the electromagnetic coil drives the second rod body to move through the moving iron core, and moves so that the contacts cooperate with each other to be in a circuit-breaking isolation state, thereby realizing automatic control of the on-off structure action. As mentioned above, the preferred application is to configure the control module with a communication module to realize the mutual communication of the on-off structures on different phases in the line, the communication between the on-off structure and the main station or the superior, the communication between the on-off structure and the handheld terminal of the operation and maintenance personnel, etc. This communication can be used to transmit the control signal of the drive mechanism, and can also be used to transmit local collected data, circuit breaker configuration data, other human-machine interaction data, etc.

[0025] It also includes an energy supply module for providing electric energy to the driving mechanism, the energy supply module includes an energy taking transformer matched with the conductive rod, and also includes a battery electrically connected to the energy taking transformer, the energy taking transformer draws electricity from the magnetic field of the conductive rod through electromagnetic induction, and the battery is used to store the electric energy collected by the energy taking transformer and to power the electromagnetic coil.

[0026] This solution is used to provide power supply for the use scenario of this on-off structure. The energy transformer is used to draw power from the line used by this on-off structure, and the battery is used to store the acquired electric energy to provide stable and reliable power supply for the control module and the drive mechanism.

[0027] The first rod and the second rod are both connected with a flexible connection structure, and the flexible connection structure is: as a conductive structure, it can produce elastic deformation in the length direction of the conductive rod; the flexible connection structure on the first rod is connected in series to the first rod and is located outside the vacuum tube; The flexible connection structure on the second rod is located at one end of the second rod away from the first rod. In the axial direction of the second rod, the drive mechanism and the permanent magnet module are both located on a side of the flexible connection structure close to the vacuum tube.

[0028] As described above, the above solution is a technical solution for providing a reliable electrical connection between the second rod body and the base plate and protecting the vacuum tube during the movement of the second rod body.

[0029] Each permanent magnet module is equipped with a flexible pad. For any permanent magnet module, when the first permanent magnet and the second permanent magnet attract each other, the flexible pad acts as an elastic cushion layer between the first permanent magnet and the second permanent magnet and undergoes compression elastic deformation.

[0030] In this solution, during the operation of the driving mechanism, the flexible pad isolates the rigid impact so that the first permanent magnet and the second permanent magnet have a smaller distance when they are attracted to each other, so as to maintain sufficient magnetic force to keep the position of the second rod body, that is, the flexible pad is used to provide flexible impact protection for the permanent magnet module or other components in this solution by undergoing compressive elastic deformation, and during the closing process, a specific amount of compressive elastic deformation occurs according to the displacement of the second rod body, so that when the corresponding first permanent magnet and the second permanent magnet are attracted to each other, the contacts have reliable contact quality.

[0031] The present solution also relates to an intelligent circuit breaker, comprising a fixed base, a top plate connected to one end of the fixed base, and a bottom plate connected to the other end of the fixed base, wherein the top plate is provided with a contact plate elastically supported on the top plate, and further comprising a switching structure as described in any one of the above items, and further comprising an outer shell, wherein the second rod body is connected to the outer shell through a driving mechanism, wherein the shell is fixed to the outer shell, and the first rod body is connected to the outer shell; The outer shell is supported between the bottom plate and the contact plate: one end of the outer shell is supported on the bottom plate, the first rod extends from the outer shell and is supported on the contact plate, the second rod is electrically connected to the bottom plate, and the first rod is electrically connected to the contact plate.

[0032] It is easy to understand that this solution is a specific application of the on-off structure on a circuit breaker, that is, a circuit breaker including the on-off structure is provided. Preferably, the outer shell is provided with a plurality of flanges distributed at different axial positions of the outer shell, and the flange is an annular protruding structure on the outer surface of the outer shell, which is used to increase the creepage distance outside the outer shell.

[0033] The present invention has the following beneficial effects: In the process of switching between the open state and the closed state, this solution only needs to provide electric energy for the electromagnetic coil of the electromagnetic driver for a short time. After completing the switching between the open state and the closed state, the permanent magnet module can be used to maintain the current state of the conductive rod. From the perspective of energy supply, this solution does not need to provide continuous power supply to the electromagnetic coil, and consumes less energy during operation, so it is suitable for using an energy-taking transformer to provide energy supply for its operation; in this solution, the two state locking of the conductive rod can be achieved by using the corresponding permanent magnet module. Different from the implementation methods of spring energy storage, latch locking, etc., this solution is not only simple in structure, but also its state switching can be completed based on the electromagnetic coil, and does not need to rely on manual recovery; in this solution, the two state switching and locking of the conductive rod can be achieved by using the corresponding permanent magnet module and the basic electromagnetic drive mechanism. Different from the implementation methods of repulsion mechanism, limit mechanism, etc., this solution has a simple structure and does not need to be configured with other transmission mechanisms for state switching and state locking, so this solution also has the characteristics of high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural schematic diagram of a specific embodiment of an intelligent circuit breaker described in the present solution, in which the housing part is partially cut away; Figure 2 A cross-sectional view of a specific embodiment of an on-off structure of an intelligent circuit breaker described in this solution; Figure 3 This is a structural schematic diagram of a specific application embodiment of the flexible connection structure described in this solution; Figure 4 FIG. 1 is a structural diagram of a specific application embodiment of the flexible connection structure described in this solution, and FIG. Figure 3 There is a difference. Figure 3 Flexible cables are used in Figure 4 Using lamination in the Figure 5 for Figure 2 A partial enlarged view of part A.

[0035] The figure marks in the accompanying drawings are respectively: 1, fixed base, 2, top plate, 3, contact plate, 4, pull ring assembly, 5, outer shell, 6, flange, 7, driving mechanism, 71, shell, 72, first permanent magnet, 73, second permanent magnet, 74, electromagnetic coil, 75, moving iron core, 76, flexible pad, 8, control module, 9, energy transformer, 10, conductive rod, 101, first rod body, 102, vacuum tube, 103, metal bellows, 104, second rod body, 105, elastic member, 106, first connecting seat, 107, flexible cable, 108, second connecting seat, 109, base, 110, contact, 111, laminate, 11, detection transformer, 12, flexible connection structure, 13, bottom plate. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with embodiments, but the present invention is not limited to the following embodiments: Embodiment 1: like Figures 1 to 5 As shown, an intelligent circuit breaker on-off structure includes a conductive rod 10 for realizing the conduction of a distribution line, wherein the conductive rod 10 includes a first rod body 101 and a second rod body 104 which are arranged opposite to each other, each of the first rod body 101 and the second rod body 104 is provided with a contact 110 which matches with the other, and further includes a driving mechanism 7 for changing the matching state of the contact 110, wherein the driving mechanism 7 is an electromagnetic driver including a housing 71, a moving iron core 75 and an electromagnetic coil 74, wherein both ends of the electromagnetic coil 74 are provided with permanent magnet modules, and each permanent magnet module includes a first permanent magnet 72 and a second permanent magnet 73; Any permanent magnet module is: the first permanent magnet 72 is fixed on the housing 71, and the second permanent magnet 73 is fixed on the second rod 104; The moving iron core 75 is fixed on the second rod body 104; When the first permanent magnet 72 and the second permanent magnet 73 on the permanent magnet module at one end of the electromagnetic coil 74 attract each other, the first permanent magnet 72 and the second permanent magnet 73 on the permanent magnet module at the other end of the electromagnetic coil 74 maintain a maximum distance away from each other; When the first permanent magnet 72 and the second permanent magnet 73 on the permanent magnet module close to the first rod body 101 are attracted to each other, the contacts 110 cooperate with each other to be in a path contact state; when the first permanent magnet 72 and the second permanent magnet 73 on the permanent magnet module far from the first rod body 101 are attracted to each other, the contacts 110 cooperate with each other to be in a circuit breaker isolation state.

[0037] When the present solution is used, as a component of the circuit breaker contact 110 mechanism, specifically, the contacts 110 of the first rod body 101 and the second rod body 104 are both used as contacts for passing the load current, the first rod body 101 and the second rod body 104 can both be made of copper rods, and the contact 110 is a silver-based alloy or other metal with low contact resistance arranged on the corresponding rod body, and as the operating mechanism of the circuit breaker, specifically, the electromagnetic coil 74 changes the position of the second rod body 104 through the moving iron core 75 after being energized, when the electromagnetic coil 74 drives the second rod body 104 to move to the side where the first rod body 101 is located through the moving iron core 75, the two contacts 110 contact each other and cooperate with each other to form a path contact state, and the conductive rod 10 is turned on. When the electromagnetic coil 74 drives the second rod body 104 through the moving iron core 75 4 moves to the side away from the first rod body 101, the two contacts 110 are separated and cooperate with each other to form a circuit breaking and isolation state, and the conductive rod 10 is disconnected. The specific application can be that after being installed on the circuit breaker, the end of the first rod body 101 away from the contact 110 thereon contacts and presses the contact plate 3, and the end of the second rod body 104 away from the contact 110 thereon contacts and presses the bottom plate 13. At the same time, the contact plate 3 is electrically connected to the power supply side through a cable, and the bottom plate 13 is electrically connected to the user side through a cable. When the conductive rod 10 is in a state where the contacts 110 cooperate with each other to form a path contact state (closing state), the circuit breaker is in a state of conducting the line. When the conductive rod 10 is in a state where the contacts 110 cooperate with each other to form a circuit breaking and isolation state (opening state), the circuit breaker is in a state of cutting off the line.

[0038] As a switch structure based on electromagnetic drive, the present solution is different from the prior art in that it is configured to include an electromagnetic coil 74, a moving iron core 75 and a permanent magnet module, and is specifically used in that the moving iron core 75 is installed on the second rod body 104, and permanent magnet modules are provided at both ends of the electromagnetic coil 74. In this way, when it is necessary to switch from the open state to the closed state, it is only necessary to energize the electromagnetic coil 74, so that the moving iron core 75, under the action of the electromagnetic coil 74, provides the second rod body 104 with a force that causes the second rod body 104 to move toward the first rod body 101. In this process, the second permanent magnet 73 fixed on the second rod body 104 moves synchronously with the second rod body 104. For the permanent magnet module on the side of the electromagnetic coil 74 close to the first rod body 101, the second permanent magnet 73 fixed on the second rod body 104 moves synchronously with the second rod body 104. The distance between the second permanent magnet 73 and the first permanent magnet 72 is reduced, and the magnetic force between the second permanent magnet 73 and the first permanent magnet 72 continues to increase. For the permanent magnet module on the side of the electromagnetic coil 74 away from the first rod body 101, the distance between the second permanent magnet 73 and the first permanent magnet 72 is increased, and the magnetic force between the second permanent magnet 73 and the first permanent magnet 72 continues to decrease. When the contacts 110 of the above two are in contact, the first permanent magnet 72 and the second permanent magnet 73 on the permanent magnet module on the side of the electromagnetic coil 74 close to the first rod body 101 are in a mutually attracted state, and the first permanent magnet 72 and the second permanent magnet 73 on the other permanent magnet module are in a state of being separated by the maximum distance. At this time, after the power supply of the electromagnetic coil 74 is disconnected, the above two The contact 110 is maintained in contact state under the action of the permanent magnet module on the side of the electromagnetic coil 74 close to the first rod body 101. Conversely, when it is necessary to switch from the closed state to the open state, it is only necessary to energize the electromagnetic coil 74, so that the moving iron core 75 provides the second rod body 104 with a force to make the second rod body 104 separate from and move away from the first rod body 101 under the action of the electromagnetic coil 74. In this process, the second permanent magnet 73 fixed on the second rod body 104 moves synchronously with the second rod body 104. For the permanent magnet module on the side of the electromagnetic coil 74 close to the first rod body 101, the distance between the second permanent magnet 73 and the first permanent magnet 72 increases, and the magnetic force between the second permanent magnet 73 and the first permanent magnet 72 continues to decrease. The coil 74 is away from the permanent magnet module on the side of the first rod body 101, the distance between the second permanent magnet 73 and the first permanent magnet 72 is reduced, and the magnetic force between the second permanent magnet 73 and the first permanent magnet 72 continues to increase. When the contacts 110 of the above two are out of contact and maintain the set disconnection distance, the first permanent magnet 72 and the second permanent magnet 73 on the permanent magnet module on the side of the electromagnetic coil 74 away from the first rod body 101 are in a mutually attracted state, and the first permanent magnet 72 and the second permanent magnet 73 on the other permanent magnet module are in a state of being separated from each other at the maximum distance. At this time, after the power supply of the electromagnetic coil 74 is disconnected, the contacts 110 of the above two are maintained in a spaced state under the action of the permanent magnet module on the side of the electromagnetic coil 74 away from the first rod body 101.

[0039] In summary, in the process of realizing the mutual switching between the open state and the closed state, the present solution only needs to provide electric energy for the electromagnetic coil 74 of the electromagnetic driver for a short time. After completing the switching between the open state and the closed state, the permanent magnet module can be used to maintain the current state of the conductive rod 10. From the perspective of energy supply, the present solution does not need to provide a continuous supply of electric energy to the electromagnetic coil 74, and consumes less energy during operation, so it is suitable for using the energy transformer 9 (energy CT) to provide energy supply for its operation; in the present solution, the two state locking of the conductive rod 10 can be realized by using the corresponding permanent magnet module, which is different from the implementation methods of using spring energy storage, latch locking, etc., and the present solution is not only simple in structure, but also its state switching can be completed based on the electromagnetic coil 74, and does not need to rely on manual recovery; in the present solution, the two state switching and locking of the conductive rod 10 can be realized by using the corresponding permanent magnet module and the basic electromagnetic drive mechanism 7, which is different from the implementation methods of using the repulsion mechanism, the limit mechanism, etc., and the present solution has a simple structure and does not need to be configured with other transmission mechanisms for state switching and state locking, so the present solution also has the characteristics of high reliability.

[0040] As a person skilled in the art, it is easy to understand that when the contacts 110 on the above two contacts are in contact with each other, the first rod body 101 and the second rod body 104 of the conductive rod 10 remain in an electrically connected state, and when the contacts 110 on the two contacts are separated from each other by a set distance, the first rod body 101 and the second rod body 104 of the conductive rod 10 remain in an electrically disconnected state. The set distance has different minimum distances depending on the specific application. For example, when the on-off structure is applied to the contact 110 set in the vacuum tube 102 and connected in series on a 10KV medium voltage line, the minimum value of the set distance can be set to 9mm. At the same time, the mutual attraction state is not limited to the state where the first permanent magnet 72 and the second permanent magnet 73 are in direct contact, but also includes the state where the first permanent magnet 72 and the second permanent magnet 73 are spaced apart. For example, when the magnetic force determined by the distance between the first permanent magnet 72 and the second permanent magnet 73 on one of the permanent magnet modules can maintain the position of the second rod 104 and the first rod 101, and the magnetic force determined by the distance between the first permanent magnet 72 and the second permanent magnet 73 on the other permanent magnet module does not affect the position of the second rod 104 and the first rod 101, and the second rod 104 is in a stationary state relative to the first rod 101, it can be considered that the first permanent magnet 72 and the second permanent magnet 73 on one of the permanent magnet modules are attracted to each other, and the first permanent magnet 72 and the second permanent magnet 73 on the other permanent magnet module maintain a distanced state with a maximum distance.

[0041] At the same time, this solution sets the operating mechanism of the circuit breaker to include the above-mentioned drive mechanism 7 and the permanent magnet module. From the volume of the on-off structure, it is only necessary to configure the permanent magnet module on both sides of the electromagnetic coil 74, and its axial and radial volumes are small. Without changing the installation basis and being compatible with the existing installation basis and installation tools, it is used to replace the fuse device on the existing fuse, and replace the fuse based on passive protection on the line with a circuit breaker based on active protection, so as to solve the problem of needing on-site maintenance to restore the fuse and frequently replacing the fuse according to changes in load, etc. On the other hand, after using this solution to replace the fuse device on the existing fuse, since the protection provided for the power grid is active protection, such as when one of the three phases in the line is disconnected due to a fault, the disconnection information can be synchronized to the other two phases provided with this solution based on the short-distance wireless communication module and the long-distance communication module (such as a cellular mobile communication module) configured for the drive mechanism 7. The other two phases choose to act or not act according to the configuration and the current operating conditions, and the function of disconnecting or closing the three phases together is realized when necessary.

[0042] For the technical solution of configuring the control module 8 for the drive mechanism 7, it can be specifically used as follows: the sensor CT (detection transformer 11) inputs the transformed current into the control module 8, the control module 8 converts the analog signal into a digital signal, and then calculates the current value of the collected signal. If the current value exceeds the set opening current value, the inverse time curve is used to calculate the remaining action time and report the situation to the master station / superior. After waiting for the remaining action time to return to zero, if there is no signal from the master station / superior to keep the closing state, the control module 8 controls the drive mechanism 7 to move the state of the conductive rod 10 from the closed closing state to the open opening state, and records and reports the action situation to the master station / superior. It is easy to understand that this solution can also be other control strategies when it is used, such as immediately executing the opening action when the current value exceeds the set opening current value.

[0043] Embodiment 2: This embodiment is further refined on the basis of embodiment 1: It also includes a vacuum tube 102, and the contacts 110 are all located in the inner space of the vacuum tube 102; The first rod 101 is fixed on the vacuum tube 102, and the second rod 104 is connected to the vacuum tube 102 through a deformable mechanism. The vacuum tube 102 and the deformable mechanism form a vacuum installation environment for the contact 110, and the deformable mechanism is a metal bellows 103 or a diaphragm-type elastic metal plate; When the driving mechanism 7 drives the second rod 104 to move, the deformable mechanism undergoes elastic deformation.

[0044] The above scheme proposes a technical scheme based on the vacuum environment formed by the vacuum tube 102 and the deformable mechanism, and the vacuum environment is used as the vacuum installation environment of the contact 110. Specifically, a vacuum switch is formed on the on-off structure to shorten the arc time when the line is disconnected, improve the pressure bearing capacity and breaking capacity, and ensure the service life and reliability. It is easy to understand that the metal bellows 103 or the diaphragm elastic metal plate adapts to the action of the second rod body 104 by deformation. At the same time, the metal bellows 103 or the diaphragm elastic metal plate is a specific selection of the deformable mechanism on the vacuum tube 102. Different from other deformable mechanisms, the radial constraint provided by the metal bellows 103 or the diaphragm elastic metal plate for the second rod body 104 can ensure the matching quality when the above contacts 110 are in contact.

[0045] Embodiment 3: This embodiment is further refined on the basis of embodiment 1: The first rod body 101 and the second rod body 104 are both connected with a flexible connection structure 12 . The flexible connection structure 12 is a conductive structure that can generate elastic deformation in the length direction of the conductive rod 10 .

[0046] In the above scheme, the flexible connection structure 12 makes the lengths of the first rod 101 and the second rod 104 adjustable. If the scheme is applied to a circuit breaker, the circuit breaker includes a fixed base 1, a top plate 2 connected to one end of the fixed base 1, and a bottom plate 13 connected to the other end of the fixed base 1. The top plate 2 is provided with a contact plate 3 elastically supported on the top plate 2. The scheme also includes assembling the scheme into an outer shell 5 of an integral structure, the second rod 104 is connected to the outer shell 5 through a driving mechanism 7, and the shell 71 is fixed to the outer shell 5. The first rod 101 is connected to the outer shell 5; the outer shell 5 is supported between the bottom plate 13 and the contact plate 3: one end of the outer shell 5 is supported on the bottom plate 13, the first rod 101 extends from the outer shell 5 and is supported on the contact plate 3, the second rod 104 is electrically connected to the bottom plate 13, the first rod 101 is electrically connected to the contact plate 3, and for the second rod 104, the flexible connection structure 12 is used to adapt to the position change of the second rod 104 to keep the second rod 104 in any state. Have stable electrical connection performance with the bottom plate 13 In order to realize the opening operation in the event of a fault in the driving mechanism 7, the outer shell 5 is further provided with a pull ring assembly 4 for manually changing the configuration state of the present solution on the circuit breaker. The pull ring assembly 4 is pulled by an insulating rod to remove the contact state between the first rod body 101 and the contact plate 3. When the first rod body 101 is provided with a flexible connection structure 12, when the present solution is embedded between the contact plate 3 and the bottom plate 13, the flexible connection structure 12 on the first rod body 101 changes the length of the present solution through elastic compression, so that the present solution can be embedded between the contact plate 3 and the bottom plate 13. The bottom plate 13 can also reduce the force on the vacuum tube 102 (the vacuum tube 102 is mostly made of ceramic material) during this process, thereby protecting the vacuum tube 102. On the other hand, the flexible connection structure 12 on the second rod body 104 not only allows the second rod body 104 to move relatively freely, but also reduces the impact on the vacuum tube 102 during the movement of the second rod body 104 by absorbing energy when the second rod body 104 performs opening or closing. This achieves the purpose of protecting the vacuum tube 102.

[0047] For the use of the above-mentioned pull ring assembly, it can be set as follows: if the upper end of the first rod body 101 and the contact plate 3 are in a conductive state, the action instruction is received through the button on the control module or the long-distance communication module or the short-distance wireless communication module, and then the control module controls the driving mechanism to move the conductive rod 10 from the open state to the closed state; if the upper end of the first rod body 101 and the contact plate 3 are in a non-conductive state, in order to protect the operators who may be present at the operation site, the on-off structure is not allowed to close.

[0048] Embodiment 4: This embodiment is further refined on the basis of Embodiment 3: The flexible connection structure 12 includes a first connection seat 106, a flexible cable 107, a second connection seat 108 and an elastic member 105; The flexible cable 107 is a flexible multi-strand cable, one end of the flexible cable 107 is fixedly connected to the first connection seat 106, and the other end of the flexible cable 107 is fixedly connected to the second connection seat 108; The flexible connection structure 12 on the first rod body 101 is connected in series to the first rod body 101: for the first rod bodies 101 on both sides of the flexible connection structure 12, the first connection seat 106 is fixedly connected to the first rod body 101 on one side, and the second connection seat 108 is fixedly connected to the first rod body 101 on the other side, and the elastic member 105 is supported and fixed between the first rod bodies 101 at both ends; The flexible connection structure 12 on the second rod body 104 is arranged at one end of the second rod body 104 away from the first rod body 101, wherein the first connection seat 106 is fixedly connected to the end of the second rod body 104, the second connection seat 108 is fixedly connected to the base 109, and the elastic member 105 is supported between the second rod body 104 and the base 109.

[0049] The above scheme provides a flexible connection structure 12 with good elasticity. Specifically, the flexible cable 107 and the elastic member 105 are used as the flexible part of the flexible connection structure 12, and the first connection seat 106 and the second connection seat 108 are used as the connection seats for installation on the flexible connection structure 12. The first connection seat 106 and the second connection seat 108 can adopt metal rings with low electrical conductivity such as copper rings or silver-based alloy rings. When used on the first rod body 101, the first connection seat 106 and the second connection seat 108 can adopt a fixing scheme that is welded on the corresponding first rod body 101. When used on the second rod body 104, the first connection seat 106 and the end of the second rod body 104 are fixedly connected by welding, and the second connection seat 108 is fixedly connected to the base 109 by welding. When used on the circuit breaker, the base 109 is supported on the bottom plate 13. In this way, the flexible cable 107 Through flexible deformation, the elastic member 105 adapts to the relative positions of the first connecting seat 106 and the second connecting seat 108 through elastic deformation. For the flexible connection structure 12 on the first rod body 101, after the present solution is installed on the circuit breaker, the elastic member 105 is in a compressive deformation state. During the installation of the present solution on the circuit breaker, the elastic member 105 is convenient for the installation of the present solution and protects the vacuum tube 102 by undergoing a greater compressive deformation. For the flexible connection structure 12 on the second rod body 104, after the present solution is installed on the circuit breaker, when the contact 110 is in the open state, the elastic member 105 is in a compressive deformation state. When the contact 110 is in the closed state, the elastic member 105 is in a free state or a tensile deformation state capable of maintaining the contact quality between the base 109 and the bottom plate 13, preferably a tensile deformation state, so as to reduce the impact of the closing action on the contact 110 and the vacuum tube 102 by storing energy.

[0050] Embodiment 5: This embodiment is further refined on the basis of Embodiment 3: The flexible connection structure 12 includes a first connection seat 106, a stack 111, and a second connection seat 108. The stack 111 includes a plurality of stacked conductive sheets, and the conductive sheets are arc-shaped bent metal sheets. One end of the stack 111 is fixedly connected to the first connection seat 106, and the other end of the stack 111 is fixedly connected to the second connection seat 108. The flexible connection structure 12 on the first rod body 101 is connected in series to the first rod body 101: for the first rod bodies 101 on both sides of the flexible connection structure 12, the first connection seat 106 is fixedly connected to the first rod body 101 on one side, and the second connection seat 108 is fixedly connected to the first rod body 101 on the other side; The flexible connection structure 12 on the second rod 104 is disposed at one end of the second rod 104 away from the first rod 101 , wherein the first connection seat 106 is fixedly connected to the end of the second rod 104 , and the second connection seat 108 is fixedly connected to the base 109 .

[0051] In parallel with the above, the above scheme provides a flexible connection structure 12 with good elasticity. Specifically, the stack 111 serves as a flexible structure and an elastic structure on the flexible connection structure 12. The first connection seat 106 and the second connection seat 108 serve as connection seats for installation on the flexible connection structure 12. The first connection seat 106 and the second connection seat 108 can adopt metal rings with low electrical conductivity such as copper rings or silver-based alloy rings. When used on the first rod body 101, the first connection seat 106 and the second connection seat 108 can adopt a fixing scheme that is welded on the corresponding first rod body 101. When used on the second rod body 104, the first connection seat 106 and the end of the second rod body 104 are fixedly connected by welding, and the second connection seat 108 is fixedly connected to the base 109 by welding. When used on the circuit breaker, the base 109 is supported on the bottom plate 13. In this way, the stack 111 adapts to the relative positions of the first connecting seat 106 and the second connecting seat 108 by deformation. For the flexible connection structure 12 on the first rod body 101, after the present solution is installed on the circuit breaker, the stack 111 is in a compressive deformation state. During the installation of the present solution on the circuit breaker, the stack 111 is convenient for the installation of the present solution and protects the vacuum tube 102 by undergoing a larger compressive deformation. For the flexible connection structure 12 on the second rod body 104, after the present solution is installed on the circuit breaker, when the contact 110 is in the open state, the stack 111 is in a compressive deformation state. When the contact 110 is in the closed state, the stack 111 is in a free state or a tensile deformation state capable of maintaining the contact quality between the base 109 and the bottom plate 13, preferably a tensile deformation state, so as to reduce the impact of the closing action on the contact 110 and the vacuum tube 102 by storing energy.

[0052] In the above two schemes, the end of the flexible cable 107 and the end of the stack 111 are welded to the first connecting seat 106 and the second connecting seat 108, or the end of the flexible cable 107 and the end of the stack 111 are encapsulated in the first connecting seat 106 and the second connecting seat 108, the elastic member 105 can use a coil spring, and the conductive sheet of the stack 111 can adopt an ellipsoidal thin shell structure, and the arc bend thereon can make it have stable elastic performance, deformation performance and the ability to maintain the second rod body 104 in its radial direction position.

[0053] Embodiment 6: This embodiment is further refined on the basis of embodiment 1: It also includes a control module 8 for controlling the driving mechanism 7, and a detection transformer 11 for current sampling on the conductive rod 10, wherein the detection transformer 11 is connected to the control module 8 by signal; The control module 8 controls the driving mechanism 7 in the following manner: the control module 8 collects the detection result of the detection transformer 11, and compares the detection result with the set current threshold value. When it is determined that the current on the lower conductive rod 10 is less than the set current threshold value, the driving mechanism 7 maintains the current path contact state of the contact 110; when it is determined that the current on the lower conductive rod 10 is greater than or equal to the set current threshold value, the electromagnetic coil 74 drives the second rod body 104 to move through the moving iron core 75, and moves so that the contacts 110 cooperate with each other to be in a circuit-breaking isolation state.

[0054] In this solution, the control module 8 is used to control the drive mechanism 7, specifically to control the electromagnetic coil 74. The detection transformer 11 is used to collect the current on the conductive rod 10. The collection position can be located on the first rod body 101 or on the second rod body 104. In order to optimize the weight of this solution and improve its installation stability, the control module 8, the drive mechanism 7, the detection transformer 11 and the following energy-taking transformer 9 are all arranged on the bottom side of the second rod body 104. In this solution, the detection result of the detection transformer 11 is used as the input signal of the control module 8. When the control module 8 determines that the current on the conductive rod 10 is less than the set current threshold, the drive mechanism 7 maintains the current path contact state of the contact 110, that is, maintains the current closing state; when it is determined that the current on the conductive rod 10 is greater than or equal to the set current threshold, the electromagnetic coil 74 drives the second rod body 104 to move through the moving iron core 75, and the movement is to make the contacts 110 cooperate with each other to be in the disconnection isolation state, so as to realize the automatic control of the on-off structure action. As described above, the preferred application is that the control module 8 is configured with a communication module to realize the mutual communication of the on-off structures on different phases in the line, the communication between the on-off structure and the main station or the superior, the communication between the on-off structure and the handheld terminal of the operation and maintenance personnel, etc. This communication can be used to transmit the control signal of the drive mechanism 7, and can also be used to transmit local collected data, circuit breaker configuration data, other human-machine interaction data, etc.

[0055] Embodiment 7: This embodiment is further refined on the basis of embodiment 1: It also includes an energy supply module for providing electrical energy to the driving mechanism 7, the energy supply module includes an energy taking transformer 9 that cooperates with the conductive rod 10, and also includes a battery electrically connected to the energy taking transformer 9. The energy taking transformer 9 draws electricity from the magnetic field of the conductive rod 10 through electromagnetic induction, and the battery is used to store the electrical energy collected by the energy taking transformer 9 and to power the electromagnetic coil 74.

[0056] This solution is used to provide power supply for the use scenario of this on-off structure. The energy transformer 9 is used to draw power from the line used by this on-off structure, and the battery is used to store the acquired electric energy to provide stable and reliable power supply for the control module 8 and the drive mechanism 7.

[0057] Embodiment 8: This embodiment is further refined on the basis of Embodiment 2: The first rod 101 and the second rod 104 are both connected with a flexible connection structure 12, and the flexible connection structure 12 is: as a conductive structure, it can produce elastic deformation in the length direction of the conductive rod 10; the flexible connection structure 12 on the first rod 101 is connected in series to the first rod 101 and is located outside the vacuum tube 102; The flexible connection structure 12 on the second rod 104 is located at one end of the second rod 104 away from the first rod 101 . In the axial direction of the second rod 104 , the drive mechanism 7 and the permanent magnet module are both located on a side of the flexible connection structure 12 close to the vacuum tube 102 .

[0058] As described above, the above solution is a technical solution for providing a reliable electrical connection between the second rod body 104 and the bottom plate 13 and protecting the vacuum tube 102 during the movement of the second rod body 104 .

[0059] Embodiment 9: This embodiment is further refined on the basis of embodiment 1: Each permanent magnet module is equipped with a flexible pad 76. For any permanent magnet module, when the first permanent magnet 72 and the second permanent magnet 73 attract each other, the flexible pad 76 acts as an elastic cushion layer between the first permanent magnet 72 and the second permanent magnet 73 and undergoes compressive elastic deformation.

[0060] In this solution, during the operation of the driving mechanism 7, the flexible pad 76 isolates the rigid impact, so that the first permanent magnet 72 and the second permanent magnet 73 have a smaller distance when they are attracted to each other, so as to maintain sufficient magnetic force to keep the position of the second rod body 104, that is, the flexible pad 76 is used to provide flexible impact protection for the permanent magnet module or other components in this solution by undergoing compressive elastic deformation, and during the closing process, a specific amount of compressive elastic deformation occurs according to the displacement of the second rod body 104, so that when the corresponding first permanent magnet 72 and the second permanent magnet 73 are attracted to each other, the contact 110 has reliable contact quality.

[0061] Embodiment 10: Based on the first embodiment, this embodiment provides an intelligent circuit breaker, including a fixed base 1, a top plate 2 connected to one end of the fixed base 1, and a bottom plate 13 connected to the other end of the fixed base 1, wherein the top plate 2 is provided with a contact plate 3 elastically supported on the top plate 2, and further includes the on-off structure as described in any one of the above items, and further includes an outer shell 5, the second rod 104 is connected to the outer shell 5 through a driving mechanism 7, the shell 71 is fixed to the outer shell 5, and the first rod 101 is connected to the outer shell 5; The outer shell 5 is supported between the bottom plate 13 and the contact plate 3: one end of the outer shell 5 is supported on the bottom plate 13, the first rod 101 extends from the outer shell 5 and is supported on the contact plate 3, the second rod 104 is electrically connected to the bottom plate 13, and the first rod 101 is electrically connected to the contact plate 3.

[0062] It is easy to understand that this solution is a specific application of the on-off structure on a circuit breaker, that is, a circuit breaker including the on-off structure is provided. Preferably, the outer shell 5 is provided with a plurality of flanges 6 distributed at different axial positions of the outer shell 5, and the flange 6 is an annular protruding structure on the outer surface of the outer shell 5, which is used to increase the creepage distance outside the outer shell 5.

[0063] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific embodiments of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments obtained without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent circuit breaker on-off structure, comprising a conductive rod (10) for realizing the conduction of a distribution line, the conductive rod (10) comprising a first rod body (101) and a second rod body (104) arranged opposite to each other, each of the first rod body (101) and the second rod body (104) being provided with a contact (110) that matches the other, and further comprising a driving mechanism (7) for changing the matching state of the contact (110), characterized in that: The driving mechanism (7) is an electromagnetic driver comprising a housing (71), a moving iron core (75), and an electromagnetic coil (74); both ends of the electromagnetic coil (74) are provided with permanent magnet modules, and each permanent magnet module comprises a first permanent magnet (72) and a second permanent magnet (73); Any permanent magnet module comprises: a first permanent magnet (72) fixed on a housing (71), and a second permanent magnet (73) fixed on a second rod (104); The moving iron core (75) is fixed on the second rod body (104); When the first permanent magnet (72) and the second permanent magnet (73) on the permanent magnet module at one end of the electromagnetic coil (74) attract each other, the first permanent magnet (72) and the second permanent magnet (73) on the permanent magnet module at the other end of the electromagnetic coil (74) maintain a distanced state with a maximum distance; When the first permanent magnet (72) and the second permanent magnet (73) on the permanent magnet module close to the first rod body (101) attract each other, the contacts (110) cooperate with each other to be in a path contact state; when the first permanent magnet (72) and the second permanent magnet (73) on the permanent magnet module far from the first rod body (101) attract each other, the contacts (110) cooperate with each other to be in a circuit breaking isolation state.

2. The intelligent circuit breaker on-off structure according to claim 1, characterized in that: Also included is a vacuum tube (102), wherein the contacts (110) are all located in the inner space of the vacuum tube (102); The first rod body (101) is fixed on the vacuum tube (102), and the second rod body (104) is connected to the vacuum tube (102) via a deformable mechanism, the vacuum tube (102) and the deformable mechanism enclose a vacuum installation environment for the contact (110), and the deformable mechanism is a metal bellows (103) or a diaphragm-type elastic metal plate; When the driving mechanism (7) drives the second rod body (104) to move, the deformable mechanism undergoes elastic deformation.

3. The intelligent circuit breaker on-off structure according to claim 1, characterized in that: The first rod body (101) and the second rod body (104) are both connected to a flexible connection structure (12), and the flexible connection structure (12) is a conductive structure capable of generating elastic deformation in the length direction of the conductive rod (10).

4. The intelligent circuit breaker on-off structure according to claim 3, characterized in that: The flexible connection structure (12) comprises a first connection seat (106), a flexible cable (107), a second connection seat (108) and an elastic member (105); The flexible cable (107) is a flexible multi-strand cable, one end of the flexible cable (107) is fixedly connected to the first connection seat (106), and the other end of the flexible cable (107) is fixedly connected to the second connection seat (108); The flexible connection structure (12) on the first rod body (101) is connected in series to the first rod body (101): for the first rod bodies (101) on both sides of the flexible connection structure (12), the first connection seat (106) is fixedly connected to the first rod body (101) on one side, and the second connection seat (108) is fixedly connected to the first rod body (101) on the other side, and the elastic member (105) is supported and fixed between the first rod bodies (101) on both sides; The flexible connection structure (12) on the second rod body (104) is arranged at an end of the second rod body (104) away from the first rod body (101), wherein the first connection seat (106) is fixedly connected to the end of the second rod body (104), the second connection seat (108) is fixedly connected to the base (109), and the elastic member (105) is supported between the second rod body (104) and the base (109).

5. The intelligent circuit breaker on-off structure according to claim 3, characterized in that: The flexible connection structure (12) comprises a first connection seat (106), a stack (111), and a second connection seat (108); the stack (111) comprises a plurality of stacked conductive sheets, the conductive sheets being arc-shaped bent metal sheets; one end of the stack (111) is fixedly connected to the first connection seat (106), and the other end of the stack (111) is fixedly connected to the second connection seat (108); The flexible connection structure (12) on the first rod body (101) is connected in series to the first rod body (101): for the first rod bodies (101) on both sides of the flexible connection structure (12), the first connection seat (106) is fixedly connected to the first rod body (101) on one side, and the second connection seat (108) is fixedly connected to the first rod body (101) on the other side; The flexible connection structure (12) on the second rod body (104) is arranged at an end of the second rod body (104) away from the first rod body (101), wherein the first connection seat (106) is fixedly connected to the end of the second rod body (104), and the second connection seat (108) is fixedly connected to the base (109).

6. The intelligent circuit breaker on-off structure according to claim 1, characterized in that: It also includes a control module (8) for controlling the driving mechanism (7), and a detection transformer (11) for sampling the current on the conductive rod (10), wherein the detection transformer (11) is signal-connected to the control module (8); The control module (8) controls the drive mechanism (7) in the following manner: the control module (8) collects the detection result of the detection mutual inductor (11), and compares the detection result with a set current threshold value; when it is determined that the current on the lower conductive rod (10) is less than the set current threshold value, the drive mechanism (7) maintains the contact (110) in the current contact state; when it is determined that the current on the lower conductive rod (10) is greater than or equal to the set current threshold value, the electromagnetic coil (74) drives the second rod body (104) to move through the moving iron core (75), and the movement causes the contacts (110) to cooperate with each other to be in a circuit-breaking isolation state.

7. The intelligent circuit breaker on-off structure according to claim 1, characterized in that: It also includes an energy supply module for providing electric energy to the drive mechanism (7), the energy supply module including an energy-taking transformer (9) matched with the conductive rod (10), and also including a storage battery electrically connected to the energy-taking transformer (9), the energy-taking transformer (9) taking electricity from the magnetic field of the conductive rod (10) by electromagnetic induction, and the storage battery being used to store the electric energy collected by the energy-taking transformer (9) and to supply power to the electromagnetic coil (74).

8. The intelligent circuit breaker on-off structure according to claim 2, characterized in that: The first rod body (101) and the second rod body (104) are both connected to a flexible connection structure (12), and the flexible connection structure (12) is: a conductive structure capable of generating elastic deformation in the length direction of the conductive rod (10); the flexible connection structure (12) on the first rod body (101) is connected in series to the first rod body (101) and is located outside the vacuum tube (102); The flexible connection structure (12) on the second rod body (104) is located at an end of the second rod body (104) away from the first rod body (101), and in the axial direction of the second rod body (104), the drive mechanism (7) and the permanent magnet module are both located on a side of the flexible connection structure (12) close to the vacuum tube (102).

9. An intelligent circuit breaker on-off structure according to any one of claims 1 to 8, characterized in that: Each permanent magnet module is provided with a flexible pad (76). For any permanent magnet module, when the first permanent magnet (72) and the second permanent magnet (73) attract each other, the flexible pad (76) acts as an elastic cushion layer between the first permanent magnet (72) and the second permanent magnet (73) and undergoes compression elastic deformation.

10. An intelligent circuit breaker, comprising a fixed base (1), a top plate (2) connected to one end of the fixed base (1), and a bottom plate (13) connected to the other end of the fixed base (1), wherein a contact plate (3) elastically supported on the top plate (2) is arranged on the top plate (2), characterized in that: It also comprises the on-off structure according to any one of claims 1 to 9, and further comprises an outer shell (5), the second rod (104) being connected to the outer shell (5) via a driving mechanism (7), the shell (71) being fixed to the outer shell (5), and the first rod (101) being connected to the outer shell (5); The outer shell (5) is supported between the bottom plate (13) and the contact plate (3): one end of the outer shell (5) is supported on the bottom plate (13), the first rod (101) extends from the outer shell (5) and is supported on the contact plate (3), the second rod (104) is electrically connected to the bottom plate (13), and the first rod (101) is electrically connected to the contact plate (3).

Images