Status synchronization mechanism, status detection device and electrical system of switchgear

Abstract

This disclosure provides a state synchronization mechanism, a state detection device, and an electrical system for a switching device. The state synchronization mechanism includes a triggering unit, a signal isolation unit, and a power supply unit. The power supply unit is electrically connected to the switching device and the signal isolation unit. The power supply unit supplies power to the switching device, enabling conduction between corresponding contacts when the contact structure in the switching device is in a closed state. The triggering unit moves in response to the movement of the contact structure, triggering the signal isolation unit to turn on or off. The signal isolation unit isolates the input signal when the contact structure performs a closing action and synchronously outputs the electrical signal indicating that the contact structure is in a closed state. This disclosure achieves effective synchronization of the contact structure's operational state while simultaneously considering the normal operation of the connected preset processor, ensuring the timeliness and stability of state synchronization.

Description

Technical Field

[0001] This disclosure relates to the field of power electronics technology, and in particular to a state synchronization mechanism, state detection device and electrical system for a switching device. Background Technology

[0002] For the status detection of switching equipment (such as contactors) in electrical systems (such as wind power systems), the current common approach is to directly connect the processor in the system to the auxiliary contacts of the switching equipment. However, these existing switching equipment status detection solutions are based on circuit structure design, which has problems such as poor structural design flexibility and inability to guarantee the accuracy of detection results, thus failing to meet the usage requirements of actual scenarios. Utility Model Content

[0003] The technical problem to be solved by this disclosure is to overcome the defects of the existing technology based on circuit structure design, such as poor structural flexibility and inability to guarantee the accuracy of detection results, thus failing to meet the needs of actual use scenarios. The purpose is to provide a technical solution based on mechanical structure design, specifically a state synchronization mechanism, state detection device and electrical system for switching equipment.

[0004] This disclosure solves the above-mentioned technical problems through the following technical solution:

[0005] In a first aspect, this disclosure provides a state synchronization mechanism for a switching device, the state synchronization mechanism comprising a triggering unit, a signal isolation unit, and a power supply unit, wherein the power supply unit is electrically connected to the switching device and the signal isolation unit;

[0006] The power supply unit is used to supply power to the switching device, so that the contact structure in the switching device is in the closed state and the corresponding contacts are connected.

[0007] The triggering unit is used to move in accordance with the movement of the contact structure to trigger the signal isolation unit to be turned on or off.

[0008] The signal isolation unit is used to isolate the input signal when the contact structure performs a closing action, and synchronously output the electrical signal indicating that the contact structure is in a closed state.

[0009] This solution proposes a cleverly designed (mechanically structure-based) state synchronization mechanism. The power supply unit reliably provides sufficient electrical energy to the contact structure (such as the main and / or auxiliary contacts of a contactor) to break down the oxide film formed at the contact points. This ensures that the contacts of the contact structure can always be broken down and conduct when powered, effectively transmitting the operating state of the contact structure. Simultaneously, the working state of the signal isolation unit switches according to the operating state of the contact structure. When conducting, it isolates the input high-energy signals, achieving timely synchronization of the contact structure's operating state while preventing the downstream connected preset processors and other devices from being affected by high voltage and high current. This ensures both the normal operation of the connected preset processors and the effective synchronization of the contact structure's operating state, guaranteeing the timeliness and stability of state synchronization.

[0010] Optionally, the triggering unit is used to move to a first preset position following the closing action of the contact structure, so as to trigger the signal isolation unit to conduct;

[0011] The triggering unit is used to move to a second preset position following the disconnection action of the contact structure, so as to trigger the signal isolation unit to disconnect.

[0012] In this solution, when the trigger unit follows the contact structure to perform either closing or opening actions, it synchronously drives the signal isolation unit to conduct to output an electrical signal to the preset processor, or drives the signal isolation unit to open. This solution has advantages such as ingenious structure, automatic synchronous linkage, and timely and reliable state synchronization.

[0013] Optionally, the triggering unit includes a blocking member disposed on the contact structure;

[0014] The signal isolation unit includes an optocoupler, which includes a light-emitting diode and a phototransistor. The input terminal of the light-emitting diode is electrically connected to the power supply unit, and the output terminal of the phototransistor is electrically connected to the input terminal of a preset device.

[0015] When the contact structure is in a closed state, the blocking member moves to the first preset position, and an optical path is formed between the output terminal of the light-emitting diode and the input terminal of the phototransistor, and the optocoupler is turned on.

[0016] When the contact structure is in the open state, the blocking member moves to the second preset position, blocking the light path between the output terminal of the light-emitting diode and the input terminal of the phototransistor, and the optocoupler is disconnected.

[0017] In this scheme, the conduction and disconnection control of the optocoupler is achieved by using a blocking device placed between the light-emitting diode and the phototransistor in the optocoupler, so as to achieve effective synchronization of the operating state of the switching equipment.

[0018] Optionally, the triggering unit includes a support member, a magnet, and a proximity switch, wherein the support member is disposed on the contact structure, and the magnet is disposed on the support member;

[0019] The signal isolation unit includes an optocoupler, which includes a light-emitting diode and a phototransistor. The output terminal of the phototransistor is electrically connected to the input terminal of a preset device. One end of the proximity switch is electrically connected to the power supply unit, and the other end of the proximity switch is electrically connected to the input terminal of the light-emitting diode.

[0020] When the contact structure is in a closed state, the support moves to the first preset position, the magnet approaches the proximity switch to trigger the proximity switch to close, and the optocoupler is turned on.

[0021] When the contact structure is in the open state, the support moves to the second preset position, the magnet moves away from the proximity switch to trigger the proximity switch to open, and the optocoupler disconnects.

[0022] In this scheme, a set of optocouplers and a magnetic structure are used to control the on and off states of the optocouplers, thereby achieving effective synchronization of the operating states of the switching equipment.

[0023] Optionally, the triggering unit includes a support member, a magnet, and a proximity switch, wherein the support member is disposed on the contact structure, and the magnet is disposed on the support member;

[0024] The signal isolation unit includes two sets of optocouplers and two diodes corresponding to the optocouplers. The optocouplers include light-emitting diodes and phototransistors. The output terminal of each phototransistor is electrically connected to the input terminals of the two diodes respectively. The collector of each phototransistor is electrically connected to the output terminal of the corresponding diode and one input terminal of the preset processor. One end of the proximity switch is electrically connected to the power supply unit, and the other end of the proximity switch is electrically connected to the input terminal of each light-emitting diode respectively.

[0025] When the contact structure is in a closed state, the support moves to the first preset position, the magnet approaches the proximity switch to trigger the proximity switch to close, and the optocoupler is turned on.

[0026] When the contact structure is in the open state, the support moves to the second preset position, the magnet moves away from the proximity switch to trigger the proximity switch to open, and the optocoupler disconnects.

[0027] In this solution, the circuit setup of two sets of optocouplers and two diodes enables the on / off control of the optocouplers, thereby achieving effective synchronization of the operating status of the switching equipment. At the same time, it ensures that electrical signals can be output normally from either output terminal, enabling more convenient and flexible electrical connection to the input terminal of the backend equipment, simplifying the operation process, and ensuring the convenience and rationality of operation in actual scenarios.

[0028] Optionally, the state synchronization mechanism further includes a switching unit, which is electrically connected to the output side of the power supply unit, and is used to turn the power supply to the power supply unit on or off.

[0029] In this scheme, a switching unit is set in the main circuit of the state synchronization mechanism to achieve more flexible control of the power supply of the entire circuit, so as to meet the power supply requirements of the actual scenario.

[0030] Optionally, the power supply unit includes a first power supply for supplying power to the coils of the signal isolation unit and the switching device;

[0031] Alternatively, the power supply unit may include a second power supply and a third power supply, wherein the second power supply is used to supply power to the signal isolation unit, and the third power supply is used to supply power to the coil of the switching device.

[0032] In this solution, the power supply unit can supply power to both the signal isolation unit and the coil simultaneously with a single power supply module, or it can be configured with two independent power supply modules to supply power to the signal isolation unit and the coil respectively, in order to meet more flexible circuit design requirements.

[0033] In a second aspect, this disclosure provides a state detection device for a switching device, the state detection device comprising a state synchronization mechanism for the switching device as described in the first aspect, and a preset processor electrically connected to the state synchronization mechanism, the state synchronization mechanism being used to synchronously output an electrical signal characterizing that the contact structure is in a closed state to the preset processor.

[0034] In this solution, the status detection device includes the aforementioned status synchronization mechanism and a preset processor, so as to effectively detect the action status of the contact structure while taking into account the normal working status of the connected preset processor, so that the preset processor can detect the status of the switching equipment in a timely manner, ensuring timely and reliable status detection.

[0035] Optionally, the status detection device further includes an anomaly detection unit, which is used to detect whether an anomaly has occurred in the contact structure.

[0036] Technical solution and technical effect: The abnormality detection unit can detect abnormal events in a timely manner (such as the main contact becoming normally closed due to adhesion), so as to trigger subsequent reminders and other operations in a timely manner.

[0037] Optionally, the status detection device further includes an anomaly alerting unit that is communicatively connected to the anomaly detection unit, the anomaly alerting unit being used to issue an alert signal indicating that an anomaly has occurred in the contact structure.

[0038] Technical solution and technical effect: It can promptly notify relevant personnel of abnormal situations so that timely intervention and handling can be carried out.

[0039] A third aspect of this disclosure provides an electrical system comprising a status detection device for a switching device as described in the second aspect, and the switching device itself.

[0040] In this solution, the electrical system includes the aforementioned status detection device and switching equipment (such as contactors, relays, etc.), thereby enabling timely and synchronous detection of the operating status of the contact structure, effectively improving the operational stability and safety of the entire electrical system, and ensuring the overall product performance.

[0041] Optionally, the electrical system includes a wind power system.

[0042] In this solution, the aforementioned status detection device is integrated into the wind power system, which effectively improves the operational stability and reliability of the system in wind power scenarios.

[0043] And / or, the switching device includes a contactor, a relay, or a circuit breaker.

[0044] This solution can be applied to the state synchronization mechanism of different types of switching equipment to meet the detection needs of more application scenarios.

[0045] Optionally, the contact structure of the switching device includes main contacts and / or auxiliary contacts.

[0046] In this solution, for the contact structure of the switching equipment, the operating states of the main contacts and auxiliary contacts are generally synchronized. The state synchronization mechanism of the switching equipment can synchronize only with the operation of the main contacts, only with the operation of the auxiliary contacts, or simultaneously with the operation of both the main contacts and auxiliary contacts. That is, the triggering unit can move only following the operation of the main contacts, only following the operation of the auxiliary contacts, or simultaneously following the operation of both the main contacts and auxiliary contacts. This allows for a more flexible circuit design and a reliable realization of the state synchronization of the switching equipment, thus meeting the detection needs of more application scenarios.

[0047] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this disclosure.

[0048] The positive and progressive effects of this disclosure are as follows:

[0049] This disclosure proposes a cleverly designed state synchronization mechanism. The power supply unit reliably provides sufficient electrical energy to the contact structure to break down the oxide film formed at the contacts, ensuring that the contacts of the contact structure can always be broken down and conduct when powered, thus effectively transmitting the operating state of the contact structure. Simultaneously, the working state of the signal isolation unit switches according to the operating state of the contact structure. When conducting, it isolates the input high-energy signals, achieving timely synchronization of the contact structure's operating state while preventing the downstream connected preset processor and other devices from being affected by high voltage and high current. This ensures both the normal operation of the connected preset processor and the effective synchronization of the contact structure's operating state, guaranteeing the timeliness and stability of state synchronization. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the state synchronization mechanism of the switching equipment in Embodiment 1 of this disclosure;

[0051] Figure 2 This is a first structural schematic diagram of the state synchronization mechanism of the switching device according to Embodiment 1 of this disclosure;

[0052] Figure 3 This is a second structural schematic diagram of the state synchronization mechanism of the switching device according to Embodiment 1 of this disclosure;

[0053] Figure 4 This is a first structural schematic diagram of the state synchronization mechanism of the switching device according to Embodiment 2 of this disclosure;

[0054] Figure 5 This is a second structural schematic diagram of the state synchronization mechanism of the switching device according to Embodiment 2 of this disclosure;

[0055] Figure 6This is a schematic diagram of the third structure of the state synchronization mechanism of the switching device according to Embodiment 2 of this disclosure;

[0056] Figure 7 This is a fourth structural schematic diagram of the state synchronization mechanism of the switching device in Embodiment 2 of this disclosure;

[0057] Figure 8 This is a fifth structural schematic diagram of the state synchronization mechanism of the switching device according to Embodiment 2 of this disclosure;

[0058] Figure 9 This is a schematic diagram of the status detection device for switching equipment according to Embodiment 3 of this disclosure;

[0059] Figure 10 This is a schematic diagram of the electrical system of Embodiment 4 of this disclosure. Detailed Implementation

[0060] The present disclosure is further illustrated below by way of embodiments, but the present disclosure is not limited to the scope of the embodiments described herein.

[0061] The prefixes such as "first" and "second" used in this disclosure are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this disclosure does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not be construed as an unnecessary limitation. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0062] Currently, the common method for detecting the status of switching devices is to directly connect the processor in the system to the auxiliary contacts of the switching device. However, these existing switching device status detection solutions are based on circuit structure design, which has problems such as poor structural flexibility, inability to guarantee the accuracy of detection results, and inability to meet the needs of actual use scenarios.

[0063] In the solution where the processor directly connects to the auxiliary contacts of the switching device, the processor typically operates at a low voltage and current. For example, if the voltage detection signal is 24VDC, the current passing through the auxiliary contacts of the contactor is usually less than 5mA. However, since the auxiliary contacts of the switching device are exposed to air, an oxide film will form after a certain period of time. The 24VDC, 5mA voltage and current passing through the auxiliary contacts cannot break through the oxide film on the surface of the auxiliary contacts, resulting in signal transmission failure. This prevents the normal detection of the status of the switching device, thus compromising the accuracy of the detection results and failing to meet the usage requirements of actual scenarios.

[0064] To address the aforementioned existing problems, this disclosure proposes a novel state synchronization scheme for switching equipment, specifically a state synchronization mechanism for switching equipment based on mechanical structure design, as follows:

[0065] Example 1

[0066] like Figure 1 As shown, the state synchronization mechanism of the switching device in this embodiment includes a triggering unit 1, a signal isolation unit 2, and a power supply unit 3; as Figure 2 and 3 As shown, the power supply unit 3 is electrically connected to the switching device and the signal isolation unit 2, and the output of the signal isolation unit 2 is electrically connected to the preset device 4 (such as the preset processor).

[0067] The switching equipment includes contactors, relays, or circuit breakers, and comprises contact structures 5 and coils 6. Contact structure 5 consists of main contacts and / or auxiliary contacts. The signal isolation unit 2 includes isolation devices based on principles such as photoelectric feedback. Figure 2 and 3 The contact structure shown is the main contact. The circuit structure of the state synchronization mechanism for the auxiliary contacts is similar, and will not be described in detail here.

[0068] Power supply unit 3 is used to supply power to the switching equipment, so that the contact structure 5 in the switching equipment is in the closed state and the corresponding contacts are connected;

[0069] The power supply unit 3 provides a power supply voltage and current that are both greater than the operating voltage and current of the preset processor. For example, the power supply unit 3 provides 220V and 10mA, while the preset processor operates at 24VDC and 5mA.

[0070] In this way, when the switching device is in the closed state, it can not only ensure that the contact end of the contact structure 5 can conduct normally when no oxide film is formed, but also effectively ensure that the contact end of the contact structure 5 can still be successfully broken down when an oxide film is formed, so that the contacts can still conduct normally, thereby avoiding the occurrence of signal transmission obstacles between contacts and effectively ensuring the realization of the synchronization of the switching device state.

[0071] Of course, the specific power supply voltage and current provided by the power supply unit 3 can be selected or adjusted according to the actual needs of the scenario, and can be flexibly configured; as long as it can ensure that the oxide film formed between the contacts of the contact structure 5 can always be effectively and timely connected, and at the same time ensure the normal operation of the back-end preset processor and other devices in the circuit, and avoid damage to the devices.

[0072] The trigger unit 1 is used to move in accordance with the action of the contact structure 5 to trigger the signal isolation unit 2 to be turned on or off;

[0073] That is, the triggering unit 1 and the contact structure 5 are structurally linked, and their movement direction and displacement are consistent; for example, when the contact structure 5 moves downward by displacement L to close, the triggering unit 1 also moves downward by displacement L to trigger the signal isolation unit 2 to conduct; when the contact structure 5 moves upward by displacement L to open, the triggering unit 1 also moves upward by displacement L to trigger the signal isolation unit 2 to open.

[0074] The signal isolation unit 2 is used to isolate the input signal when the contact structure 5 performs a closing action, and synchronously output the electrical signal that indicates that the contact structure 5 is in a closed state.

[0075] Specifically, the function of the signal isolation unit 2 is not only to follow the contact structure 5 to perform the closing action and realize its own conduction, but also to isolate the high voltage and high current signals input on the input side after conduction, so as to ensure that the working status of the back-end connected equipment is not affected, thereby ensuring the operational stability of the back-end connected equipment.

[0076] In addition, when the contact structure 5 performs the disconnection action, the circuit in the entire state synchronization mechanism is in an open circuit state. The preset device at the back end cannot receive the electrical signal indicating that the contact structure 5 is in a closed state. At this time, the preset device defaults to the contact structure 5 being in an open state, so as to achieve timely and reliable synchronization of the disconnection action of the contact structure 5.

[0077] In one feasible embodiment, the state synchronization mechanism also includes a current-limiting resistor connected in series on the input side of the signal isolation unit 2.

[0078] Among them, such as Figure 2 and 3 R in the figure represents the current-limiting resistor. The size and number of current-limiting resistors can be reasonably set or adjusted according to the design requirements of the actual scenario.

[0079] In this scheme, a current-limiting resistor is set in the main circuit of the state synchronization mechanism to protect the corresponding components in the circuit from damage due to overcurrent, so as to ensure the overall stability and reliability of the state synchronization mechanism.

[0080] In one feasible solution, the state synchronization mechanism also includes a switching unit, which is connected to the output side of the power supply unit 3. The switching unit is used to turn the power supply to the power supply unit 3 on or off.

[0081] Among them, such as Figure 2 and 3 S in the diagram represents a switching unit, which is a single-pole switch. When it is closed, the power supply unit 3 supplies power to the downstream circuit. Conversely, when it is open, it is equivalent to cutting off the overall power supply. The power supply unit 3 no longer supplies power to the downstream circuit, and the entire state synchronization mechanism is in the open state.

[0082] In this scheme, a switching unit is set in the main circuit of the state synchronization mechanism to achieve more flexible control of the power supply of the entire circuit, so as to meet the power supply requirements of the actual scenario.

[0083] This solution proposes a cleverly designed (mechanically structure-based) state synchronization mechanism. The power supply unit reliably provides sufficient electrical energy to break down the oxide film formed at the contact points, ensuring that the contacts remain connected under power supply conditions, thus effectively transmitting the contact structure's operational state. Simultaneously, the signal isolation unit switches its operating state in sync with the contact structure's operational state, isolating high-energy input signals during conduction. This ensures timely synchronization of the contact structure's operational state while preventing the downstream connected processors and other devices from being affected by high voltage and current. Therefore, it effectively synchronizes the contact structure's operational state while ensuring the normal operation of the connected processors, guaranteeing the timeliness and stability of state synchronization.

[0084] Example 2

[0085] The state synchronization mechanism of the switching device in this embodiment is a further improvement on Embodiment 1, specifically:

[0086] In one feasible solution, the trigger unit 1 is used to move to a first preset position following the closing action of the contact structure 5, so as to trigger the signal isolation unit 2 to conduct.

[0087] The trigger unit 1 is used to move to the second preset position following the disconnection action of the contact structure 5, so as to trigger the signal isolation unit 2 to disconnect. The trigger unit 1 and the contact structure 5 are structurally linked, and their movement direction and displacement are consistent. The contact structure 5 corresponds to two position states when it is open and closed, and the trigger unit 1 also moves to the corresponding position when the contact structure 5 is open and closed. At this time, the position of the trigger unit 1 can trigger the signal isolation unit 2 to be turned on or off, so as to achieve the effect of synchronously triggering the entire state synchronization mechanism to be turned on or off through structural linkage.

[0088] In this solution, when the trigger unit follows the contact structure to perform either closing or opening actions, it synchronously drives the signal isolation unit to conduct to output an electrical signal to the preset processor, or drives the signal isolation unit to open. This solution has advantages such as ingenious structure, automatic synchronous linkage, and timely and reliable state synchronization.

[0089] In a feasible solution, such as Figure 4 As shown, the triggering unit includes a blocking element 7, which is disposed on the contact structure 5; the blocking element 7 moves up and down as the contact structure closes or opens.

[0090] The signal isolation unit includes an optocoupler 8, which includes a light-emitting diode 9 and a phototransistor 10. The input terminal of the light-emitting diode 9 is electrically connected to the power supply unit 3, and the output terminal of the phototransistor 10 is electrically connected to the input terminal of the preset device.

[0091] When the contact structure 5 is in the closed state, the blocking member 7 moves to the first preset position, and an optical path is formed between the output end of the light-emitting diode and the input end of the phototransistor, and the optocoupler 8 is turned on.

[0092] When the contact structure 5 is in the open state, the blocking member 7 moves to the second preset position, blocking the light path between the output terminal of the light-emitting diode and the input terminal of the phototransistor, and the optocoupler 8 is disconnected.

[0093] Specifically, when the contact structure 5 is in the open state, the blocking member 7 blocks the light-emitting diode and the phototransistor to block the light path between them, so that the optocoupler 8 is in the open state. Thus, the preset processor at the back end cannot receive the electrical signal indicating that the contact structure 5 is in the closed state. At this time, the preset processor synchronously obtains that the contact structure 5 is in the open state.

[0094] When the contact structure 5 is in the closed state, the blocking member 7 moves away from the light-emitting diode and the phototransistor, and no longer creates an obstruction, so that the light-emitting diode and the phototransistor can form an optical path smoothly. The optocoupler 8 is turned on, so that the preset processor at the back end can synchronously receive the electrical signal indicating that the contact structure 5 is in the closed state. At this time, the preset processor synchronously obtains that the contact structure 5 is in the closed state.

[0095] Specifically, such as Figure 4 As shown, when the contact structure 5 is in the closed state, the second preset position A of the blocking member 7 is not affected by the blocking member 7. At this time, the position of the trigger unit can trigger the signal isolation unit 2 to conduct.

[0096] like Figure 5 As shown, when the contact structure 5 is in the open state, the blocking member 7 is in the third preset position B, which blocks the light-emitting diode and the phototransistor. At this time, the position of the trigger unit 1 can trigger the signal isolation unit 2 to open.

[0097] Specifically, the blocking component 7 is a blocking plate or blocking block, etc. The specific weight, size, material, etc. are not limited, as long as it can effectively block the light path between the output end of the light-emitting diode and the input end of the phototransistor when the contact structure 5 is open, and at the same time, when the contact structure 5 is closed, the light path between the output end of the light-emitting diode and the input end of the phototransistor is not blocked, so as to ensure that the light path between the output end of the light-emitting diode and the input end of the phototransistor is formed normally.

[0098] Of course, it is important to note that the weight of the blocking component 7 should not be too heavy, and it should be avoided that the blocking component 7 becomes too heavy over time due to oxidation or other reasons. This is to prevent abnormal situations such as the contact structure 5 failing to disconnect smoothly due to the excessive weight of the blocking component 7, so as to further ensure the timely and reliable synchronization of the state of the contact structure 5.

[0099] In this scheme, the conduction and disconnection control of the optocoupler is achieved by using a blocking device placed between the light-emitting diode and the phototransistor in the optocoupler, so as to achieve effective synchronization of the operating state of the switching equipment.

[0100] In a feasible solution, such as Figure 6 As shown, the triggering unit 1 includes a support member 11, a magnet 12, and a proximity switch 13. The support member 11 is disposed on the contact structure 5, and the magnet 12 is disposed on the support member 11. The support member 11 moves up and down as the contact structure closes or opens, so as to drive the magnet 12 to move up and down together, so as to approach or move away from the proximity switch 13.

[0101] The signal isolation unit 2 includes an optocoupler 14, which includes a light-emitting diode 15 and a phototransistor 16. The output terminal of the phototransistor 16 is electrically connected to the input terminal of the preset device. One end of the proximity switch 13 is electrically connected to the power supply unit 3, and the other end of the proximity switch 13 is electrically connected to the input terminal of the light-emitting diode 15.

[0102] Among them, such as Figure 6 As shown, when the contact structure 5 is in the closed state, the support member 11 moves to the first preset position A, the magnet 12 approaches the proximity switch 13 to trigger the proximity switch 13 to close, and the optocoupler 14 is turned on.

[0103] like Figure 7 As shown, when the contact structure 5 is in the open state, the support 11 moves to the second preset position B, the magnet 12 moves away from the proximity switch 13 to trigger the proximity switch 13 to open, and the optocoupler 14 is disconnected.

[0104] In this scheme, a set of optocouplers and a magnetic structure are used to control the on and off states of the optocouplers, thereby achieving effective synchronization of the operating states of the switching equipment.

[0105] In a feasible solution, such as Figure 8 As shown, the signal isolation unit 2 includes two sets of optocouplers 14 and two diodes 17 corresponding to the optocouplers 14. The optocouplers 14 include light-emitting diodes 15 and phototransistors 16. The output terminal of each phototransistor 16 is electrically connected to the input terminals of the two diodes 17 respectively. The collector of each phototransistor 16 is electrically connected to the output terminal of the corresponding diode 17 and an input terminal of the preset processor. One end of the proximity switch 13 is electrically connected to the power supply unit 3, and the other end of the proximity switch 13 is electrically connected to the input terminal of each light-emitting diode 15 respectively.

[0106] When the contact structure 5 is in the closed state, the support member 11 moves to the first preset position, the magnet 12 approaches the proximity switch 13 to trigger the proximity switch 13 to close, and the optocoupler 14 is turned on.

[0107] When the contact structure 5 is in the open state, the support 11 moves to the second preset position, the magnet 12 moves away from the proximity switch 13 to trigger the proximity switch 13 to open, and the optocoupler 14 is disconnected.

[0108] In this solution, the circuit setup of two sets of optocouplers and two diodes enables the on / off control of the optocouplers, thereby achieving effective synchronization of the operating state of the switching equipment. At the same time, it allows electrical signals to be output normally to the preset device from any output terminal, enabling more convenient and flexible electrical connection with the input terminal of the backend equipment, simplifying the operation process, and ensuring the convenience and rationality of operation in actual scenarios.

[0109] In one feasible embodiment, the power supply unit 3 includes a first power supply for supplying power to the coils of the signal isolation unit 2 and the switching device;

[0110] In this solution, the power supply unit is a first power supply, which supplies power to the connected devices at the back end. Specifically, the operating voltage of the first power supply can be a fixed voltage or an adjustable operating voltage power supply device, so as to achieve more flexible power supply requirements.

[0111] In one feasible embodiment, the power supply unit 3 includes a second power supply and a third power supply, the second power supply being used to power the signal isolation unit 2 and the third power supply being used to power the coil of the switching device.

[0112] In this solution, the power supply unit may not be a single power supply unit; it may include two power supply devices, namely a second power supply and a third power supply, to independently power different objects, thereby meeting the circuit design requirements in different practical scenarios and achieving a more flexible and personalized design.

[0113] Example 3

[0114] like Figure 9 As shown, the state detection device of the switching device in this embodiment includes a state synchronization mechanism 100 of the switching device as in embodiment 1 or 2, and a preset processor 200 electrically connected to the state synchronization mechanism 100. The state synchronization mechanism 100 is used to synchronously output an electrical signal representing that the contact structure is in a closed state to the preset processor 200.

[0115] Among them, the preset processor 200 includes, but is not limited to, PLC (Programmable Controllers).

[0116] When the preset processor 200 does not receive an electrical signal indicating that the contact structure is in a closed state, it automatically assumes that the contact structure in the switching device is in an open state, so as to realize timely synchronous detection of the action state of the contact structure 5 as open.

[0117] When the contact structure performs a disconnection action, the circuit in the entire state synchronization mechanism is in an open circuit state. The preset device at the back end cannot receive the electrical signal indicating that the contact structure is in a closed state. At this time, the preset device defaults to the contact structure being in an open state, so as to achieve timely and reliable synchronization of the disconnection action of the contact structure and realize effective detection of the state of the switching device.

[0118] In addition, the status detection device of the switching equipment in this embodiment may also include an abnormality detection unit. The abnormality detection unit is used to detect whether the contact structure is abnormal, such as the main contact being normally closed due to adhesion, and the main contact remaining closed even when the power supply unit stops supplying power to the coil. In such cases, an abnormality reminder signal is triggered so as to trigger subsequent reminders and other operations in a timely manner.

[0119] For example, the anomaly detection unit can be a device that includes an image acquisition unit and an image processor. That is, the image acquisition unit acquires a state image of the contact structure and sends it to the image processor for processing to obtain a processing result indicating whether an anomaly has occurred in the contact structure. It should be noted that the processing procedure for detecting whether an anomaly has occurred in the contact structure is a function inherent in the selected existing device, and the processing principle involved is not within the scope of protection of this embodiment. Of course, the anomaly detection unit can also be implemented using other devices, as long as they can be implemented, which will not be elaborated here.

[0120] The status detection device for the switching equipment in this embodiment may further include an anomaly alert unit communicatively connected to the anomaly detection unit. The anomaly alert unit is used to issue an alert signal indicating an anomaly in the contact structure, promptly informing relevant personnel of the abnormality so that timely intervention can be carried out. This anomaly alert unit includes, but is not limited to, a display, a voice announcer, a video player, and an indicator light; wherein, the display is used to display the text indicating an anomaly in the contact structure; the voice announcer is used to directly announce the voice alert (text or alarm tone) indicating an anomaly in the contact structure; the video player is used to play the corresponding video of the anomaly in the contact structure, and may also simultaneously announce the voice alert; the indicator light uses a specific display color and a specific display frequency light signal to indicate an anomaly in the contact structure.

[0121] In this solution, the status detection device includes the aforementioned status synchronization mechanism and a preset processor, so as to effectively detect the action status of the contact structure while taking into account the normal working status of the connected preset processor, so that the preset processor can detect the status of the switching equipment in a timely manner, ensuring timely and reliable status detection.

[0122] Example 4

[0123] like Figure 10 As shown, the electrical system of this embodiment includes a status detection device 300 for a switching device as in Embodiment 3, and a switching device 400.

[0124] In this solution, the electrical system includes the aforementioned status detection device 300 and switching equipment 400 (such as contactors, relays, etc.), thereby enabling timely and synchronous detection of the operating status of the contact structure, effectively improving the operational stability and safety of the entire electrical system, and ensuring the overall product performance.

[0125] Example 5

[0126] The electrical system in this embodiment is a further improvement on embodiment 4, specifically:

[0127] In one feasible solution, the electrical system includes a wind power system.

[0128] In this solution, the aforementioned status detection device 300 is integrated into the wind power system, which effectively improves the operational stability and reliability of the system in wind power scenarios and further enhances the overall product performance of the existing wind power system.

[0129] In one feasible embodiment, the switchgear 400 includes contactors, relays, or circuit breakers, etc.

[0130] This solution can be applied to the state synchronization mechanism 100 of different types of switching equipment 400 to meet the detection needs of more application scenarios.

[0131] In one feasible embodiment, the contact structure 5 includes main contacts and / or auxiliary contacts.

[0132] Specifically, the wind power system includes a wind turbine, a yaw motor for controlling the rotation direction of the wind turbine, and a contactor for controlling the start and stop of the yaw motor. The contactor is provided with auxiliary contacts. When the auxiliary contacts develop an oxide film due to moisture, the power supply unit of this embodiment can provide a sufficiently large voltage and current to break down the oxide film, thereby avoiding contact signal transmission failure.

[0133] In this solution, for the contact structure of the switchgear 400, the operating states of the main contacts and auxiliary contacts are generally synchronized. The state synchronization mechanism of the switchgear 400 can synchronize only with the operation of the main contacts, only with the operation of the auxiliary contacts, or simultaneously with the operation of both the main contacts and auxiliary contacts. That is, the triggering unit can move only following the operation of the main contacts, only following the operation of the auxiliary contacts, or simultaneously following the operation of both the main contacts and auxiliary contacts. This allows for a more flexible circuit design and a reliable realization of the state synchronization of the switchgear 400, thus meeting the detection needs of more application scenarios.

[0134] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. A state synchronization mechanism of a switching device, characterized by, The state synchronization mechanism includes a triggering unit, a signal isolation unit, and a power supply unit, wherein the power supply unit is electrically connected to the switching device and the signal isolation unit. The power supply unit is used to supply power to the switching device, so that the contact structure in the switching device is in the closed state and the corresponding contacts are connected. The triggering unit is used to move in accordance with the movement of the contact structure to trigger the signal isolation unit to be turned on or off. The signal isolation unit is used to isolate the input signal when the contact structure performs a closing action, and synchronously output the electrical signal indicating that the contact structure is in a closed state.

2. The state synchronization mechanism of a switching device according to claim 1, characterized in that, The triggering unit is used to move to a first preset position following the closing action of the contact structure, so as to trigger the signal isolation unit to conduct; The triggering unit is used to move to a second preset position following the disconnection action of the contact structure, so as to trigger the signal isolation unit to disconnect.

3. The state synchronization mechanism of a switching device according to claim 2, characterized in that, The triggering unit includes a blocking element, which is disposed on the contact structure; The signal isolation unit includes an optocoupler, which includes a light-emitting diode and a phototransistor. The input terminal of the light-emitting diode is electrically connected to the power supply unit, and the output terminal of the phototransistor is electrically connected to the input terminal of a preset device. When the contact structure is in a closed state, the blocking member moves to the first preset position, and an optical path is formed between the output terminal of the light-emitting diode and the input terminal of the phototransistor, and the optocoupler is turned on. When the contact structure is in the open state, the blocking member moves to the second preset position, blocking the light path between the output terminal of the light-emitting diode and the input terminal of the phototransistor, and the optocoupler is disconnected.

4. The state synchronization mechanism of the switching equipment as described in claim 2, characterized in that, The triggering unit includes a support member, a magnet, and a proximity switch. The support member is disposed on the contact structure, and the magnet is disposed on the support member. The signal isolation unit includes an optocoupler, which includes a light-emitting diode and a phototransistor. The output terminal of the phototransistor is electrically connected to the input terminal of a preset device. One end of the proximity switch is electrically connected to the power supply unit, and the other end of the proximity switch is electrically connected to the input terminal of the light-emitting diode. When the contact structure is in a closed state, the support moves to the first preset position, the magnet approaches the proximity switch to trigger the proximity switch to close, and the optocoupler is turned on. When the contact structure is in the open state, the support moves to the second preset position, the magnet moves away from the proximity switch to trigger the proximity switch to open, and the optocoupler disconnects.

5. The state synchronization mechanism of a switching device according to claim 2, wherein The triggering unit includes a support member, a magnet, and a proximity switch. The support member is disposed on the contact structure, and the magnet is disposed on the support member. The signal isolation unit includes two sets of optocouplers and two diodes corresponding to the optocouplers. The optocouplers include light-emitting diodes and phototransistors. The output terminal of each phototransistor is electrically connected to the input terminals of the two diodes. The collector of each phototransistor is electrically connected to the output terminal of the corresponding diode and an input terminal of a preset processor. One end of the proximity switch is electrically connected to the power supply unit, and the other end of the proximity switch is electrically connected to the input terminal of each light-emitting diode. When the contact structure is in a closed state, the support moves to the first preset position, the magnet approaches the proximity switch to trigger the proximity switch to close, and the optocoupler is turned on. When the contact structure is in the open state, the support moves to the second preset position, the magnet moves away from the proximity switch to trigger the proximity switch to open, and the optocoupler disconnects.

6. The state synchronization mechanism of a switching device according to any one of claims 1 to 5, characterized in that, The state synchronization mechanism further includes a switching unit, which is electrically connected to the output side of the power supply unit and is used to turn the power supply of the power supply unit on or off.

7. The state synchronization mechanism of a switching device according to any one of claims 1 to 5, characterized in that, The power supply unit includes a first power supply, which is used to supply power to the coils of the signal isolation unit and the switching device. Alternatively, the power supply unit may include a second power supply and a third power supply, wherein the second power supply is used to supply power to the signal isolation unit, and the third power supply is used to supply power to the coil of the switching device.

8. A state detection device of a switching device, characterized by comprising: The state detection device includes a state synchronization mechanism for the switching equipment as described in any one of claims 1-7, and a preset processor electrically connected to the state synchronization mechanism. The state synchronization mechanism is used to synchronously output an electrical signal characterizing that the contact structure is in a closed state to the preset processor.

9. The state detecting apparatus of the switching device according to claim 8, wherein The status detection device further includes an anomaly detection unit, which is used to detect whether an anomaly has occurred in the contact structure.

10. The state detecting apparatus of a switching device according to claim 9, wherein The status detection device further includes an anomaly alert unit that is communicatively connected to the anomaly detection unit. The anomaly alert unit is used to issue an alert signal indicating that an anomaly has occurred in the contact structure.

11. An electrical appliance system characterized by The electrical system includes a status detection device for a switching device as described in any one of claims 8-10, and the switching device itself.

12. The appliance system of claim 11, wherein, The electrical system includes a wind power system; And / or, the switching device includes a contactor, a relay, or a circuit breaker.

13. The appliance system of claim 11 or 12, wherein, The contact structure of the switching device includes main contacts and / or auxiliary contacts.

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