An action mechanism and a switching device

Abstract

The present invention provides an actuating mechanism and switching device, relating to the field of low-voltage electrical appliance technology, comprising: a static metal core fixedly disposed on a base, a movable metal core drivingly connected to a movable contact assembly, a first elastic member connected to the static metal core at one end and the movable metal core at the other end; a coil wound around the movable metal core and / or the static metal core, for, when positive current is applied to the coil, causing the movable metal core to move toward the static metal core by magnetic field force to drive the movable contact assembly to conduct with the static contact; and, when reverse current is applied to the coil, causing the movable metal core to move away from the static metal core by the reset force of the first elastic member to drive the movable contact assembly to separate from the static contact. The use of magnetic control in conjunction with the first elastic member can further increase the opening and closing speed of the actuating mechanism, enabling rapid switching between two sections of incoming power in a shorter time, thereby ensuring the stability of continuous operation of important electrical equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage electrical appliances, and in particular to an action mechanism and a switching device. Background Art

[0002] Power-consuming enterprises in the petroleum, chemical, fiber, metallurgy, and fine processing industries often experience unplanned power outages, large voltage fluctuations, or short power outages due to failures or abnormalities in the external main power supply network. Due to the unique process flow of these enterprises, power outages or abnormalities often cause equipment shutdown or idling, process interruption, waste generation, and sometimes even the scrapping of production equipment, among other serious consequences.

[0003] Currently, enterprises requiring continuous power supply generally use low-voltage backup automatic switching to switch between two incoming power sources. However, due to the long switching time of the backup automatic switching, which can last for over 100ms, some important equipment may trip and lock, causing equipment shutdown. Summary of the Invention

[0004] The purpose of the present invention is to provide an action mechanism and a switching device to solve the problem of long switching time of existing backup automatic switching equipment in view of the above-mentioned deficiencies in the prior art.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present invention are as follows:

[0006] According to one aspect of an embodiment of the present invention, an actuating mechanism is provided, comprising: a base, a moving contact assembly, a static metal core, a moving metal core, a coil, and a first elastic member; the static metal core is fixedly arranged on the base, the moving metal core is drive-connected to the moving contact assembly, one end of the first elastic member is connected to the static metal core, and the other end is connected to the moving metal core; the coil is wound around the moving metal core and / or the static metal core, and is used for, when positive power is applied to the coil, causing the moving metal core to move toward the static metal core by the magnetic field force to drive the moving contact assembly and the static contact to conduct; when negative power is applied to the coil, causing the moving metal core to move in a direction away from the static metal core by the reset force of the first elastic member to drive the moving contact assembly and the static contact to separate.

[0007] Optionally, the moving contact assembly includes an insulating member and a moving contact, one end of the insulating member passes through the moving metal core and the static metal core and is connected to the moving contact, and the insulating member can slide relative to the static metal core along the passing direction.

[0008] Optionally, the actuating mechanism further includes a second elastic member; one end of the second elastic member is connected to the moving metal core and the other end is connected to the insulating member, and is used to provide abutting force to the moving contact against the static contact through the insulating member when the moving contact and the static contact are conductive.

[0009] Optionally, the movable metal core and the static metal core are respectively provided with a first cavity and a second cavity that are interconnected; the insulating member is passed through the first cavity and the second cavity; and the first elastic member and the second elastic member are respectively sleeved on the outer circumference of the insulating member.

[0010] Optionally, a first annular groove is provided on the static metal core, and a second annular groove opposite to the opening of the first annular groove is provided on the movable metal core; when the movable contact assembly is connected to the static contact, the coil is located in the first annular groove and the second annular groove.

[0011] Optionally, the actuating mechanism further includes a controller, which is electrically connected to the coil and is used to supply forward electricity or reverse electricity to the coil.

[0012] Optionally, the actuating mechanism further includes a manual member, which is drivingly connected to the moving contact assembly and is used to drive the moving contact assembly to separate from the static contact.

[0013] Another aspect of an embodiment of the present invention provides a switching device, including a shell and a static contact, a first actuating mechanism and a second actuating mechanism arranged inside the shell; the moving contact assembly of the first actuating mechanism and the moving contact assembly of the second actuating mechanism are respectively located on both sides of the static contact; the first actuating mechanism and / or the second actuating mechanism adopt any of the above-mentioned actuating mechanisms.

[0014] Optionally, the switching device also includes a vacuum arc extinguisher having an arc extinguishing chamber; the static contact is located in the arc extinguishing chamber, and the static contact divides the arc extinguishing chamber into a first arc extinguishing chamber and a second arc extinguishing chamber; the moving contact assembly of the first actuating mechanism is arranged in the first arc extinguishing chamber, and the moving contact assembly of the second actuating mechanism is arranged in the second arc extinguishing chamber.

[0015] Optionally, the switching device also includes a locking linkage; one end of the locking linkage is connected to the first action mechanism and the other end is connected to the second action mechanism, and is used to limit the closing of the second action mechanism and the static contact when the first action mechanism is closed with the static contact, and to limit the closing of the first action mechanism and the static contact when the second action mechanism is closed with the static contact.

[0016] The beneficial effects of the present invention include:

[0017] The present invention provides an actuating mechanism, comprising: a base, a movable contact assembly, a static metal core, a movable metal core, a coil, and a first elastic member; the static metal core is fixedly mounted on the base, the movable metal core is drive-connected to the movable contact assembly, one end of the first elastic member is connected to the static metal core, and the other end is connected to the movable metal core; the coil is wound around the movable metal core and / or the static metal core, and is used to, when positive power is applied to the coil, cause the movable metal core to move toward the static metal core through magnetic field force to drive the movable contact assembly and the static contact to conduct; when reverse power is applied to the coil, the resetting force of the first elastic member causes the movable metal core to move in a direction away from the static metal core to drive the movable contact assembly and the static contact to separate. The use of magnetic control in conjunction with the first elastic member can further increase the opening and closing speed of the actuating mechanism, achieving rapid switching between two sections of incoming power in a shorter time, thereby ensuring the stability of continuous operation of important electrical equipment.

[0018] The present invention provides a switching device, wherein a static contact is provided in a housing of the switching device, and a first actuating mechanism and a second actuating mechanism are provided on both sides of the static contact, respectively, wherein, when necessary, the moving contact assembly of the first actuating mechanism can complete opening or closing on one side of the static contact, and the moving contact assembly of the second actuating mechanism can complete opening or closing on the other side of the static contact. That is, a structural form is formed in which two actuating mechanisms share one static contact. This structural form can effectively improve the utilization rate of the internal space of the housing, and facilitates the realization of a miniaturized switching device. When the first actuating mechanism and / or the second actuating mechanism adopt the actuating mechanism in the aforementioned embodiment, the volume can be further reduced, and at the same time, the controllable precision is high, the service life is long, and the switching speed is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is one of the structural diagrams of an action mechanism provided by an embodiment of the present invention;

[0021] Figure 2 An exploded diagram of the structure of an action mechanism provided by an embodiment of the present invention;

[0022] Figure 3 A second structural diagram of an action mechanism provided by an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of a switching device provided by an embodiment of the present invention;

[0024] Figure 5 A second structural diagram of a switching device provided by an embodiment of the present invention;

[0025] Figure 6 This is a third structural diagram of a switching device provided by an embodiment of the present invention.

[0026] Icons: 100-base; 210-static metal core; 211-first annular groove; 220-moving metal core; 221-second annular groove; 230-coil; 310-insulating member; 311-second elastic member; 312-first elastic member; 313-limiting member; 320-moving contact; 400-static contact; 500-micro switch; 600-manual member; 700-terminal block; 710-locking linkage member; 720-protrusion; 800-housing; 810-vacuum arc extinguisher; 811-first arc extinguishing chamber; 812-second arc extinguishing chamber. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. It should be noted that, unless there is a conflict, the various features of the embodiments of the present invention may be combined with each other, and the combined embodiments are still within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0032] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] In one aspect of an embodiment of the present invention, an actuating mechanism is provided, comprising: a base 100, a movable contact 320 assembly, a static metal core 210, a movable metal core 220, a coil 230, and a first elastic member 312; the static metal core 210 is fixedly disposed on the base 100, the movable metal core 220 is drivingly connected to the movable contact 320 assembly, one end of the first elastic member 312 is connected to the static metal core 210, and the other end is connected to the movable metal core 220; the coil 230 is wound around the movable metal core 220 and / or the static metal core 210, and is configured to, when positive power is applied to the coil 230, cause the movable metal core 220 to move toward the static metal core 210 by magnetic field force to drive the movable contact 320 assembly to be conductive with the static contact 400; when reverse power is applied to the coil 230, cause the movable metal core 220 to move in a direction away from the static metal core 210 by the restoring force of the first elastic member 312 to drive the movable contact 320 assembly to separate from the static contact 400.

[0034] For example, Figure 1 、 Figure 2 and Figure 3As shown, the static metal core 210 is fixedly mounted on the base 100, and its connection with the base 100 can be detachable or non-detachable. The movable metal core 220 is drive-connected to the movable contact 320 assembly. In this embodiment, the drive connection can be a fixed connection, or it can be connected via an elastic member, etc. A first elastic member 312 is connected between the static metal core 210 and the movable metal core 220. The first elastic member 312 can be in a compressed state so that the first elastic member 312 can always provide a force to move the static metal core 210 and the movable metal core 220 away from each other due to its self-resetting characteristics. This force can serve as the driving force when the movable contact 320 assembly is opened. To enable the movable metal core 220 to drive the movable contact 320 assembly to close the circuit breaker when necessary, a coil 230 may be wound around the static metal core 210, the movable metal core 220, or both the static metal core 210 and the movable metal core 220. This allows the static metal core 210 and the movable metal core 220 to move toward each other under the force of the magnetic field generated by magnetization, overcoming the restoring force of the first elastic member 312, thereby driving or driving the movable contact 320 assembly to complete closing with the static contact 400. When opening the circuit breaker, reverse current is applied to the coil 230 to eliminate the magnetic field. The restoring force of the first elastic member 312 then acts to move the static metal core 210 and the movable metal core 220 away from each other, simultaneously driving the movable contact 320 assembly to open the circuit breaker. The use of magnetic control in conjunction with the first elastic member 312 can further increase the opening and closing speed of the operating mechanism, enabling rapid switching between the two incoming power sources in a shorter time, thereby ensuring the continuous and stable operation of important electrical equipment.

[0035] In actual use, the moving metal core 220 is far away from the static metal core 210, that is, there is a certain opening distance between the two. The size of the opening distance can be reasonably set according to the actual use requirements and the safety of the opening and closing. At this time, the moving contact 320 assembly driven by the moving metal core 220 is in the opening position. When it is necessary to close the switch, positive power is passed to the coil 230, so that the moving metal core 220 and the static metal core 210 are magnetized to generate a magnetic field. Since the two opposite ends are opposite magnetic poles, an attractive force is generated between the two. Since the static metal core 210 is fixedly set on the base 100, the moving metal core 220 gradually approaches the static metal core 210 under the action of the magnetic field force and synchronously compresses the first elastic member 312. At the same time, it also drives the moving contact 320 assembly driven by the moving metal core 220 to approach the static contact 400 until the two complete the closing. At this time, the circuit is turned on and this state is maintained. When opening is required, reverse current is applied to coil 230 to eliminate the magnetic field generated by forward current, maintaining the neutral position between the movable metal core 220 and the static metal core 210. This allows the movable metal core 220 to be quickly driven away from the static metal core 210 by the restoring force of the compressed first elastic member 312, thereby driving the movable contact 320 assembly to complete the opening. The static metal core 210 and the movable metal core 220 can be made of the same material or different materials, such as iron or steel.

[0036] Optionally, the moving contact 320 assembly includes an insulating member 310 and a moving contact 320, one end of the insulating member 310 is passed through the moving metal core 220 and the static metal core 210 and is connected to the moving contact 320, and the insulating member 310 is slidably connected to the moving metal core 220 so that the insulating member 310 can slide relative to the static metal core 210 along the passing direction.

[0037] For example, Figure 2As shown, the moving contact 320 has the property of cooperating with the static contact 400 to conduct electricity, and the insulating member 310 can drive the moving contact 320 to move under the action of the moving metal core 220 while playing the role of insulation, thereby improving the safety of the equipment using this action mechanism. In order to achieve the effect of the moving metal core 220 driving the moving contact 320 assembly, one end of the insulating member 310 can also pass through the moving metal core 220 and the static metal core 210 (interchangeable) in sequence along the movement direction of the moving metal core 220 and then be fixedly connected to the moving contact 320, so as to establish an indirect connection between the moving metal core 220 and the static metal core 210 through the insulating member 310, thereby achieving controllable movement of the moving metal core 220. The insulating member 310 and the moving metal core 220 can be fixedly connected or slidably connected (when overtravel occurs later), etc. At the same time, the insulating part 310 and the static metal core 210 are slidingly connected, and the sliding direction can be along the penetration direction, so as to realize the straight up and down movement of the moving metal core 220, the insulating part 310 and the moving contact 320, which is conducive to the miniaturization of the action mechanism and the switching device.

[0038] In actual operation: When closing the circuit breaker, the movable metal core 220 drives the insulating member 310 to move in the direction where the insulating rod passes through the static metal core 210. The insulating member 310 then drives the movable contact 320 toward the static contact 400 until the circuit breaker is closed. When opening the circuit breaker, the movable metal core 220 drives the insulating member 310 in the opposite direction (opposite to the direction of movement during closing) until the insulating member 310 drives the movable contact 320 to open the circuit breaker.

[0039] Optionally, the actuating mechanism further includes a second elastic member 311; one end of the second elastic member 311 is connected to the movable metal core 220, and the other end is connected to the insulating member 310, and is used to provide an abutting force to the movable contact 320 against the static contact 400 through the insulating member 310 when the movable contact 320 and the static contact 400 are conductive.

[0040] For example, Figure 2 and Figure 3As shown, to further improve the stability of the conduction between the movable contact 320 and the static contact 400 during closing, a second elastic member 311 can be disposed between the movable metal core 220 and the insulating member 310. Specifically, one end of the second elastic member 311 is connected to the movable metal core 220, and the other end is connected to the insulating member 310. In this case, the distance m between the movable contact 320 and the static contact 400 when in the open state can be set to be smaller than the distance n between the movable metal core 220 and the static metal core 210 when in the open state, and the difference between the distance n and the distance m is h. This allows the movable metal core 220 to first move a distance m when closing the circuit. At this point, the movable metal core 220, through the second elastic member 311, drives the insulating member 310 to move, bringing the movable contact 320 and the static contact 400 into contact. At this point, the movable metal core 220, under the action of the magnetic force, continues to move a distance h or less than h. Because the movable contact 320 is already in contact with the static contact 400, it compresses the second elastic member 311. By compressing the second elastic member 311 , a contact force for pressing the static contact 400 can be provided to the moving contact 320 , thereby achieving overtravel and ensuring reliable conduction of the circuit.

[0041] Optionally, the movable metal core 220 and the static metal core 210 are respectively provided with a first cavity and a second cavity that are interconnected; the insulating member 310 is inserted into the first cavity and the second cavity; the first elastic member 312 and the second elastic member 311 are respectively sleeved on the outer circumference of the insulating member 310.

[0042] For example, Figure 3 As shown, a first cavity can be provided within the movable metal core 220, while a second cavity can be provided within the stationary metal core 210. The openings on opposite sides of the first and second cavities correspond to each other, allowing the insulating member 310 to pass through the first and second cavities, respectively, to connect with the movable contact 320. In other words, the insulating member 310 is partially accommodated within the first and second cavities. The second elastic member 311 can be sleeved around the outer periphery of the insulating member 310, with one end connected to or abutting the movable metal core 220 and the other end connected to or abutting the insulating member 310. The first elastic member 312 can be sleeved around the insulating member 310 and the outer periphery of the second elastic member 311, thereby simplifying the structure and saving layout space while achieving their respective functions. Furthermore, since the first and second elastic members 312 and 311 are both located within the cavities between the movable and stationary metal cores 220 and 210, they can effectively avoid interference from external structures during operation, further improving the stability and reliability of the actuating mechanism.

[0043] In order to improve the performance of the action mechanism when opening the gate, Figure 2As shown, a stopper 313, such as a baffle, may also be fixedly provided on the insulating member 310. The stopper 313 is located on a side of the movable metal core 220 that is relatively far from the static metal core 210. When opening the circuit breaker, the movable metal core 220 can open the movable contact 320 by pulling the second elastic member 311 and pushing the stopper 313 to move the insulating member 310. When closing the circuit breaker, the movable metal core 220 will disengage from the stopper 313 when the second elastic member 311 achieves overtravel.

[0044] The first elastic member 312 and the second elastic member 311 can be in various forms such as compression springs, tension springs, and spring sheets.

[0045] Optional, such as Figure 2 and Figure 3 As shown, a first annular groove 211 may be provided on the static metal core 210, and a second annular groove 221 may be provided on the movable metal core 220, which is opposite to the opening of the first annular groove 211. When the movable contact 320 assembly is in conduction with the static contact 400, the coil 230 may be located in the first annular groove 211 and the second annular groove 221. The following forms may be included:

[0046] The first type: in the open state, the coil 230 is only wound around the static metal core 210, that is, the coil 230 is only located in the first annular groove 211. The second type: in the open state, the coil 230 is only wound around the movable metal core 220, that is, the coil 230 is only located in the second annular groove 221. The third type: in the open state, the coil 230 is partially located in the first annular groove 211 and the second annular groove 221. It should be noted that the height of the coil 230 along the direction from the movable metal core 220 to the static metal core 210 should be less than or equal to the sum of the heights of the first annular groove 211 and the second annular groove 221 in the same direction, so as to avoid interference caused by the coil 230 when the movable metal core 220 moves.

[0047] Optionally, the actuating mechanism further includes a controller, which is electrically connected to the coil 230 and is configured to pass a forward current or a reverse current into the coil 230 .

[0048] For example, the controller can be electrically connected to the coil 230, that is, the controller can control the direction of electricity flowing into the coil 230. The controller can be controlled manually or through a certain preset program to control when and in what direction electricity is flowing into the coil 230 according to trigger conditions.

[0049] When the above-mentioned action mechanism is applied to the switching device, under normal conditions, the electrical equipment is normally connected to the main power supply through the switching device. When the main power supply fails, the controller obtains a fault signal and, at the same time, controls the action mechanism connected to the main power supply to open (i.e., a reverse current is passed to the moving metal core 220 to complete the opening), and then controls the action mechanism connected to the backup power supply to close (i.e., a forward current is passed to the moving metal core 220 to complete the closing). In order to facilitate the operator to monitor the opening and closing states of the action mechanism safely and effectively, a micro switch 500 (such as Figure 1 The position of the movable metal core 220 is monitored by a sensor such as a pressure sensor, a photoelectric sensor, etc. In the case of a micro switch 500, a push rod can be provided on the movable metal core 220. The movement of the movable metal core 220 causes the push rod to push the micro switch 500, thereby indicating the state of the actuating mechanism.

[0050] Optionally, the actuating mechanism further includes a manual member 600 , which is drivingly connected to the moving contact 320 assembly and is used to drive the moving contact 320 assembly to separate from the static contact 400 .

[0051] For example, a manual member 600 may be provided on the housing 800, for example Figure 4 As shown, a manual lever is provided, which is drivingly connected to the insulating member 310 of each phase operating mechanism (the manual lever can be provided with hooks arranged in sequence along the axial direction, and the insulating member 310 is provided with a through hole, and the hooks are inserted into the through hole). By rotating the manual lever, the insulating member 310 can be driven to pull the moving contact 320 to complete the circuit breaker opening in an emergency. The provision of the manual member 600 can effectively improve the safety of the operating mechanism.

[0052] Another aspect of an embodiment of the present invention provides a switching device, including a shell 800 and a static contact 400, a first actuating mechanism and a second actuating mechanism arranged inside the shell 800; the moving contact 320 component of the first actuating mechanism and the moving contact 320 component of the second actuating mechanism are respectively located on both sides of the static contact 400; the first actuating mechanism and / or the second actuating mechanism adopt any of the above-mentioned actuating mechanisms.

[0053] For example, Figure 4 、 Figure 5 and Figure 6As shown, a static contact 400 is provided in the housing 800 of the switching device, and at the same time, a first action mechanism and a second action mechanism are respectively provided on both sides of the static contact 400, wherein, when necessary, the movable contact 320 component of the first action mechanism can complete opening or closing on one side of the static contact 400, and the movable contact 320 component of the second action mechanism can complete opening or closing on the other side of the static contact 400. That is, a structural form is formed in which two action mechanisms share one static contact 400. This structural form can effectively improve the utilization rate of the internal space of the housing 800, and facilitate the realization of a miniaturized switching device. When the first action mechanism and / or the second action mechanism adopt the action mechanism in the aforementioned embodiment, the volume can be further reduced, and at the same time, the controllable precision is high, the service life is long, and the switching speed is fast. The opening speed can reach within 5ms, and the closing speed can reach within 10ms.

[0054] like Figure 4 As shown, the switching device can include four groups arranged in parallel, each group using a structure in which the first and second actuating mechanisms share a static contact 400, thereby achieving the purpose of connecting a four-phase power supply. Of course, in other embodiments, the switching device can be in the form of one, two, three, five, etc. groups, thereby achieving the purpose of connecting a single-phase, two-phase, or multi-phase power supply. The movable contact 320 assembly in the first actuating mechanism of the switching device can be connected to a terminal block 700, which can be connected to the main power supply; the movable contact 320 assembly in the second actuating mechanism can also be connected to another terminal block 700, which can be connected to the backup power supply. The use of this switching device can include three states: in the open state, the moving contact 320 and the static contact 400 connected to the main power supply are disconnected, and the moving contact 320 and the static contact 400 connected to the backup power supply are disconnected. In this state, maintenance, planned power outages, etc. can be achieved; when the main end is in operation, the moving contact 320 and the static contact 400 connected to the main power supply can be controlled to be connected, and the moving contact 320 and the static contact 400 connected to the backup power supply can be disconnected, so as to achieve normal operation of the electrical equipment; when the backup end is in operation, the moving contact 320 and the static contact 400 connected to the main power supply can be controlled to be disconnected, and the moving contact 320 and the static contact 400 connected to the backup power supply can be controlled to be connected, so as to achieve rapid and automatic switching of the electrical equipment to the backup power supply mode when the main power supply fails. The terminal block 700 extends beyond the vacuum interrupter 810 for connection to external electrical equipment. To prevent the terminal block 700 from interfering with the movement of the movable contact 320, the connection between the terminal block 700 and the movable contact 320 can be a flexible connection, for example, using copper with good deformability and conductivity. The switching device can also be designed with a number of stages per section (three or four) based on site requirements.

[0055] Optional, such as Figure 5As shown, the switching device also includes a vacuum arc extinguisher 810 having an arc extinguishing chamber; the static contact 400 is located in the arc extinguishing chamber, and the static contact 400 divides the arc extinguishing chamber into a first arc extinguishing chamber 811 and a second arc extinguishing chamber 812; the moving contact 320 component of the first actuating mechanism is arranged in the first arc extinguishing chamber 811, and the moving contact 320 component of the second actuating mechanism is arranged in the second arc extinguishing chamber 812.

[0056] For example, in order to improve the opening and closing performance of the moving contact 320 and the static contact 400 and reduce the electrical wear of the moving contact 320 and the static contact 400 caused by the arc, a vacuum arc extinguisher 810 can also be provided. An integral vacuum arc extinguishing chamber is provided in the true arc extinguisher, such as Figure 6 As shown, the two moving contacts 320 cooperate with a shared static contact 400. The static contact 400 cooperates with a seal to divide the entire arc extinguishing chamber into a first arc extinguishing chamber 811 and a second arc extinguishing chamber 812. The first arc extinguishing chamber 811 includes one side of the static contact 400 and the moving contact 320 of the first actuating mechanism, while the second arc extinguishing chamber 812 includes the other side of the static contact 400 and the moving contact 320 of the second actuating mechanism. This creates a double break, which facilitates miniaturization of the switching device.

[0057] Optionally, the switching device also includes a locking linkage 710; one end of the locking linkage 710 is connected to the first action mechanism and the other end is connected to the second action mechanism, and is used to limit the closing of the second action mechanism and the static contact 400 when the first action mechanism and the static contact 400 are closed, and to limit the closing of the first action mechanism and the static contact 400 when the second action mechanism and the static contact 400 are closed.

[0058] For example, in order to further improve the safety of the switching device, a locking linkage 710 may be provided, one end of which is connected to the first action mechanism and the other end is connected to the second action mechanism, so that when one of the first action mechanism and the second action mechanism is closed with the static contact 400, the other is restricted from closing with the static contact 400. The arrangement may be as follows: Figure 4As shown, the openings or slots at both ends of the locking linkage 710 are respectively mounted on the protrusions 720 on the movable metal core 220 or the insulating member 310 in the upper and lower actuating mechanisms (to improve the reliability of the connection, positioning members such as baffles or blocks are provided at the ends of the protrusions 720 to prevent the locking linkage 710 from separating from the protrusions 720). When one end of the locking linkage 710 abuts the upper protrusion 720, it can slide relative to the lower protrusion 720 by a distance y. The movement distance of the upper and lower movable metal cores 220 when closing is x. Distance y should be greater than or equal to distance x and less than distance 2x to prevent the two actuating mechanisms from closing simultaneously, fundamentally eliminating the possibility of dual power circulation and avoiding switching failures. In another embodiment, the distance y should be greater than the distance x and less than the distance 2x. In this embodiment, when the upper action mechanism is closed, the locking linkage 710 and the lower action mechanism can also slide a distance z which is the difference between the distance y and the distance x. By setting the difference distance z, the switching time when switching between the main power supply and the backup power supply can be effectively shortened.

[0059] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A switching device, characterized in that: The invention comprises a housing and a static contact, a first actuating mechanism and a second actuating mechanism arranged inside the housing; the movable contact assembly of the first actuating mechanism and the movable contact assembly of the second actuating mechanism are respectively located on both sides of the static contact; the first actuating mechanism and the second actuating mechanism are actuating mechanisms; The circuit breaker further comprises a locking linkage member; one end of the locking linkage member is connected to the first actuating mechanism, and the other end is connected to the second actuating mechanism, and is used to restrict the second actuating mechanism from closing with the static contact when the first actuating mechanism is closed with the static contact, and to restrict the first actuating mechanism from closing with the static contact when the second actuating mechanism is closed with the static contact; The locking linkage has openings at both ends, and is respectively sleeved over the protrusions on the movable metal cores or the protrusions on the insulating member in the first and second actuating mechanisms; and the switching device satisfies the following conditions: x<y<2x, where x is the movement distance of the movable metal cores in the first and second actuating mechanisms when they are closed, and y is the sliding distance that one end of the locking linkage can slide relative to the protrusion of the second actuating mechanism when it abuts against the protrusion of the first actuating mechanism; The actuating mechanism includes: a base, a moving contact assembly, a static metal core, a moving metal core, a coil and a first elastic member; the static metal core is fixedly arranged on the base, the moving metal core is drivingly connected to the moving contact assembly, one end of the first elastic member is connected to the static metal core, and the other end is connected to the moving metal core; the coil is wound around the moving metal core and / or the static metal core, and is used for, when positive power is applied to the coil, causing the moving metal core to move toward the static metal core by the magnetic field force to drive the moving contact assembly and the static contact to be conductive; when reverse power is applied to the coil, causing the moving metal core to move in a direction away from the static metal core by the reset force of the first elastic member to drive the moving contact assembly to separate from the static contact.

2. The switching device according to claim 1, wherein: The moving contact assembly includes an insulating member and a moving contact. One end of the insulating member passes through the moving metal core and the static metal core and is connected to the moving contact. The insulating member can slide relative to the static metal core along the passing direction.

3. The switching device according to claim 2, wherein: It also includes a second elastic member; one end of the second elastic member is connected to the moving metal core and the other end is connected to the insulating member, and is used to provide abutting force to the moving contact against the static contact through the insulating member when the moving contact and the static contact are conductive.

4. The switching device according to claim 3, wherein: The movable metal core and the static metal core are respectively provided with a first cavity and a second cavity which are interconnected; the insulating member is passed through the first cavity and the second cavity; the first elastic member and the second elastic member are respectively sleeved on the outer circumference of the insulating member.

5. The switching device according to claim 1, wherein: A first annular groove is provided on the static metal core, and a second annular groove opposite to the opening of the first annular groove is provided on the movable metal core; when the movable contact assembly is connected to the static contact, the coil is located in the first annular groove and the second annular groove.

6. The switching device according to any one of claims 1 to 5, characterized in that: The device further comprises a controller, which is electrically connected to the coil and is used to supply forward power or reverse power to the coil.

7. The switching device according to any one of claims 1 to 5, characterized in that: It also includes a manual member, which is drivingly connected to the moving contact assembly and is used to drive the moving contact assembly to separate from the static contact.

8. The switching device according to claim 1, wherein: It also includes a vacuum arc extinguisher having an arc extinguishing chamber; the static contact is located in the arc extinguishing chamber, and the static contact divides the arc extinguishing chamber into a first arc extinguishing chamber and a second arc extinguishing chamber; the moving contact assembly of the first actuating mechanism is arranged in the first arc extinguishing chamber, and the moving contact assembly of the second actuating mechanism is arranged in the second arc extinguishing chamber.

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