Electromagnetic trip device and DC switch device

Abstract

The present application relates to an electromagnetic tripping device and a DC switch device. The electromagnetic tripping device triggers a switch action by electromagnetic force, and includes: a main coil and a main iron core; a main push rod, which can move between a main push rod extension position and a main push rod retracted position along the central axis of the main coil, and the main push rod triggers a switch action at the main push rod extension position; a control coil and a control iron core, the control coil can receive current to generate a control magnetic field; the control push rod, which can move between a control push rod extension position and a control push rod retracted position along the central axis of the control coil, wherein the control iron core can push the control push rod from the control push rod retracted position to the control push rod extension position under the action of the electromagnetic force of the control magnetic field, and wherein, the control push rod drives the main push rod from the main push rod retracted position to the main push rod extension position during the process of the control push rod moving from the control push rod retracted position to the control push rod extension position. This scheme improves the operating reliability of the electromagnetic tripping device.

Description

Technical Field

[0001] The present application relates to the field of direct current control, and in particular to an electromagnetic tripping device and a direct current switch device. Background Art

[0002] High-voltage direct current (HVDC) switches are key components in power transmission and distribution systems, used to control the on and off of current in high-voltage direct current grids. With the continuous advancement of grid technology and the increasing requirements for power system reliability, the performance and stability of HVDC switches have become a focal issue in grid operations. As an important component of HVDC switches, the design and function of electromagnetic releases directly affect the response speed, reliability and safety of the switches.

[0003] In the prior art, electromagnetic releases usually contain one or more coils, which control the opening and closing of switches through the action of electromagnetic force. However, a common problem in traditional designs is that the two coils may use a common iron core, which may cause electromagnetic interference and affect the stability and independence of the release. In addition, the secondary circuit of the coil often contains resistors and capacitors to achieve smooth control of current or regulation of magnetic field, but this increases the complexity and failure rate of the equipment and also increases the cost.

[0004] In order to meet the high reliability requirements of grid customers for HVDC switch operating mechanisms, strict countermeasure requirements are put forward for electromagnetic releases in particular. These requirements include avoiding the use of a common core for two coils and not using resistors and capacitors in the secondary circuit to reduce potential failure points and improve operational safety. The electromagnetic releases and their HVDC switch designs currently on the market often find it difficult to simultaneously achieve these requirements, especially in terms of maintaining equipment cost competitiveness and compactness of the operating mechanism. Summary of the invention

[0005] The embodiments of the present application provide an electromagnetic tripping device and a DC switch device to at least solve the electromagnetic interference problem caused by the shared iron core of the electromagnetic tripping coil in the prior art, and the high complexity and high failure rate problems caused by the use of a resistor and capacitor circuit in the secondary circuit of the coil.

[0006] According to one aspect of an embodiment of the present application, an electromagnetic tripping device is provided, which triggers a switch action by an electromagnetic force, including: a main coil and a main iron core, wherein the main iron core is arranged in the main coil along the central axis of the main coil; a main push rod, which is arranged in the main coil along the central axis of the main coil and can move between a main push rod extended position and a main push rod retracted position along the central axis of the main coil, and the main push rod triggers a switch action at the main push rod extended position; a control coil and a control iron core, wherein the control iron core is arranged in the control coil along the central axis of the control coil, and the control coil can receive current to generate a control magnetic field; a control push rod, which is arranged in the control coil along the central axis of the control coil and can move between a control push rod extended position and a control push rod retracted position along the central axis of the control coil, wherein the control iron core can push the control push rod from the control push rod retracted position to the control push rod extended position under the action of the electromagnetic force of the control magnetic field, and wherein, in the process of the control push rod moving from the control push rod retracted position to the control push rod extended position, the main push rod is driven to move from the main push rod retracted position to the main push rod extended position.

[0007] In this way, through the independent main iron core and control iron core design, the present invention realizes the independent operation of the two electromagnetic coils, avoids the electromagnetic interference that may be caused by the traditional shared iron core structure, and significantly improves the stability and reliability of the electromagnetic tripping device.

[0008] According to an exemplary embodiment of the present application, the control iron core is slidably arranged in the control coil, and the control push rod is fixed at one end of the control iron core, and the control iron core can be pushed by the electromagnetic force of the control magnetic field to push the control push rod from the retracted position of the control push rod to the extended position of the control push rod, or the control iron core is a hollow ring and is fixedly arranged in the control coil, and the control push rod is slidably arranged in the control iron core, and the electromagnetic force of the control magnetic field pushes the control push rod from the retracted position of the control push rod to the extended position of the control push rod.

[0009] In this way, the present invention provides a flexible control core and control mandrel connection scheme, ensuring the precise movement of the control mandrel under the electromagnetic force of the control magnetic field, thereby improving the response speed and accuracy of the electromagnetic trip device to switch control.

[0010] According to an exemplary embodiment of the present application, the main coil can receive current to generate a main magnetic field, and the main iron core can push the main push rod from a main push rod retracted position to a main push rod extended position under the action of the electromagnetic force of the main magnetic field.

[0011] In this way, the main magnetic field generated by the main coil directly drives the main iron core, thereby driving the movement of the main push rod.

[0012] According to an exemplary embodiment of the present application, the main iron core is slidably set in the main coil, and the main push rod is fixed at one end of the main iron core, and the main iron core can be pushed by the electromagnetic force of the main magnetic field to push the main push rod from the retracted position of the main push rod to the extended position of the main push rod, or the main iron core is a hollow ring and is fixedly set in the main coil, and the main push rod is slidably set in the main iron core, and the electromagnetic force of the main magnetic field pushes the main push rod from the retracted position of the main push rod to the extended position of the main push rod.

[0013] In this way, the connection between the main push rod and the main iron core of the present invention ensures that under the action of the main magnetic field generated by the main coil, the main push rod can quickly and stably move from the retracted position to the extended position to trigger the switch action.

[0014] According to an exemplary embodiment of the present application, the control push rod is coaxially connected to the main push rod.

[0015] In this way, the main ram can be pushed by the control ram.

[0016] According to an exemplary embodiment of the present application, the main coil is mounted on a main coil mounting plate, a first through hole allowing a main push rod to pass through is provided on the main coil mounting plate, and the electromagnetic tripping device also includes a control coil mounting mechanism for mounting the control coil to the axial position of the main coil, wherein the control coil mounting mechanism includes: at least one adapter plate, the adapter plate is arranged on the main coil mounting plate and extends outward from the main coil mounting plate, and a plurality of first holes are provided on the adapter plate; a plurality of support rods, each support rod is mounted on the adapter plate through one of the plurality of first holes, and extends from the adapter plate in the direction of mounting the control coil; and at least one control coil mounting plate, the control coil is mounted on the control coil mounting plate, a second through hole allowing a control push rod to pass through is provided on the control coil mounting plate, the control coil mounting plate is provided with a plurality of second holes, each support rod mounts the control coil mounting plate at an installation position on the plurality of support rods through one of the plurality of second holes, and wherein the installation position allows the control push rod to drive the main push rod to move from the main push rod retracted position to the main push rod extended position during the process of the control push rod moving from the control push rod retracted position to the control push rod extended position.

[0017] In this way, through the cooperation of the main coil mounting plate and the control coil mounting mechanism, the present invention provides stable installation and precise positioning of the control coil and the main coil, avoids malfunction caused by improper installation, and improves the overall stability and operating accuracy of the electromagnetic tripping device.

[0018] According to an exemplary embodiment of the present application, a control coil mounting plate supporting portion is provided on the support rod, and is provided on at least one of the multiple support rods on one side of the control coil mounting plate of the adapter plate for supporting the control coil mounting plate, and the support rod passes through the second hole, and the support rod is provided with a thread at one end of the control coil mounting plate, and the control coil mounting plate is fixed to the control coil mounting plate supporting portion by bolts via the threads.

[0019] In this way, the control coil mounting plate supporting portion and bolt connection design in the present invention ensures the secure installation of the control coil mounting plate, while allowing fine adjustment of the installation position through the thread, ensuring the accuracy and reliability of the control push rod movement.

[0020] According to an exemplary embodiment of the present application, the electromagnetic tripping device also includes an adjustment mechanism for adjusting the axial relative position between the main coil and the control coil, wherein the adjustment mechanism includes: at least one gasket, which is sleeved on the support rod between the control coil mounting plate and the control coil mounting plate supporting portion.

[0021] In this way, the gasket adjustment mechanism of the present invention realizes fine adjustment of the axial relative position between the main coil and the control coil, further optimizing the performance and flexibility of the electromagnetic tripping device.

[0022] According to an exemplary embodiment of the present application, the control coil mounting plate supporting portion can be axially moved on the support rod through a thread.

[0023] In this way, by controlling the axial movement ability of the coil mounting plate support portion on the support rod, the present invention provides a way to adjust the relative movement distance between the control push rod and the main push rod, thereby enhancing the adaptability and stability of the electromagnetic tripping device under different working conditions.

[0024] According to another aspect of the embodiments of the present application, a DC switch device is also provided, including: a switch, and an electromagnetic tripping device that triggers the switch action by electromagnetic force according to any one of the embodiments of the present application.

[0025] In this way, the electromagnetic tripping device provided by the present invention is integrated into the DC switch device, which effectively overcomes the limitations of the electromagnetic tripping device in the prior art, provides a more stable, reliable and economical control solution for the high-voltage DC switch operating mechanism, and improves the safety, efficiency and operation stability of the entire power system.

[0026] In an embodiment of the present application, a technical solution for a non-shared iron core stacked electromagnetic tripping device for a high-voltage DC switch operating mechanism is provided to at least solve the electromagnetic interference problem caused by the shared iron core of two electromagnetic tripping coils in the prior art, and the technical problem of increased system complexity and failure rate caused by the use of a resistor-capacitor circuit in the secondary circuit, thereby achieving the goal of improving the stability and reliability of the electromagnetic tripping device, optimizing the switch control response speed and accuracy, simplifying the switch control mechanism, enhancing the consistency and reliability of the operating system, reducing energy loss and delay in control signal transmission, ensuring stable installation and precise positioning of the control coil and the main coil, providing a firm installation and fine-tuning capability of the control coil mounting plate, optimizing the axial relative position fine-tuning to improve the electromagnetic action performance, enhancing adaptability and stability, and providing a more economical, more stable and more reliable DC switch control solution, which comprehensively improves the technical effects of safe operation, efficiency and cost-effectiveness of the power system.

[0027] This technical solution achieves effective separation and independent control of the two electromagnetic tripping coils through independent core design and optimized top rod linkage mechanism, avoids electromagnetic interference, simplifies secondary circuit design, reduces failure rate and cost, and ensures high response speed and control accuracy of the electromagnetic tripping device, providing solid technical support for the reliability of the high-voltage DC switch operating mechanism. Through this design, the present invention not only meets the strict requirements of the power system for high-voltage DC switches, but also provides a more advanced and practical electromagnetic tripping device solution for the power industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 is a schematic diagram of an electromagnetic tripping device according to an embodiment of the present application;

[0030] Figure 2 is a schematic diagram of a control coil of an electromagnetic tripping device according to an exemplary embodiment of the present application;

[0031] Figure 3 is a schematic diagram of a control coil of an electromagnetic tripping device according to another exemplary embodiment of the present application;

[0032] Figure 4 is a schematic diagram of a main coil of an electromagnetic trip device according to an exemplary embodiment of the present application;

[0033] Figure 5 is a schematic diagram of a main coil of an electromagnetic trip device according to another exemplary embodiment of the present application;

[0034] Figure 6 is a partial schematic diagram of a control coil installation mechanism of an electromagnetic trip device according to an exemplary embodiment of the present application;

[0035] Figure 7 is a schematic diagram of an adapter plate of an electromagnetic trip device according to an exemplary embodiment of the present application;

[0036] Figure 8 is a schematic diagram of a control coil mounting plate of an electromagnetic trip device according to an exemplary embodiment of the present application;

[0037] Fig. 9 is a schematic diagram of a control coil mounting plate of an electromagnetic trip device according to another exemplary embodiment of the present application;

[0038] Fig.10 is a schematic diagram of an electromagnetic tripping device according to another exemplary embodiment of the present application;

[0039] Fig.11 is a schematic diagram of a DC switch device according to an embodiment of the present application.

[0040] Caption of the attached figure:

[0041] 1. DC switchgear;

[0042] 10. Electromagnetic tripping device;

[0043] 110, main coil;

[0044] 112, main iron core;

[0045] 114, main top rod;

[0046] 120, control coil;

[0047] 122, control core;

[0048] 124, control push rod;

[0049] 130, main coil mounting plate;

[0050] 131, a first through hole;

[0051] 151, adapter plate;

[0052] 153, first hole;

[0053] 155, support rod;

[0054] 157, control coil mounting plate;

[0055] 158, second through hole;

[0056] 159, second hole;

[0057] 171, control coil mounting plate supporting portion;

[0058] 173, bolt;

[0059] 175, gasket;

[0060] 20. Switch. DETAILED DESCRIPTION

[0061] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0062] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or modules or units is not necessarily limited to those steps or modules or units clearly listed, but may include other steps or modules or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0063] According to an embodiment of the present application, an electromagnetic tripping device is provided. Figure 1 is a schematic diagram of an electromagnetic tripping device according to an embodiment of the present application. Figure 2 is a schematic diagram of the control coil of the electromagnetic tripping device according to an exemplary embodiment of the present application, showing the control push rod in a retracted position. Figure 3 is a schematic diagram of the control coil of the electromagnetic tripping device according to another exemplary embodiment of the present application, showing the control push rod in the extended position of the control push rod. Figure 4 is a schematic diagram inside a main coil of an electromagnetic trip device according to an exemplary embodiment of the present application, showing the main push rod in a retracted position. Figure 5 It is a schematic diagram inside the main coil of the electromagnetic tripping device according to another exemplary embodiment of the present application, showing the main push rod in the main push rod extended position.

[0064] like Figures 1 to 5As shown, the electromagnetic tripping device 10 triggers the switch action by electromagnetic force. The electromagnetic tripping device 10 includes: a main coil 110 and a main iron core 112, a main top rod 114, a control coil 120 and a control iron core 122, and a control top rod 124.

[0065] According to the embodiment of the present application, the main iron core 112 is arranged in the main coil 110 along the central axis of the main coil 110. The iron core is in the electromagnetic release to enhance the magnetic field generated by the coil. It is usually made of materials with high magnetic permeability, such as silicon steel sheets, ferrites or certain alloys. When current passes through the coil wound on the iron core, a magnetic field is generated around the iron core. The functions of the iron core are, for example:

[0066] Flux guidance: The iron core can concentrate and guide the magnetic flux generated by the coil so that the magnetic flux flows along a specific path, thereby improving the efficiency and performance of the electromagnetic device.

[0067] Magnetic field enhancement: Due to the high magnetic permeability of the iron core, it can significantly enhance the magnetic field generated by the coil, which means that even at a smaller current, sufficient electromagnetic force can be generated.

[0068] Conversion of electromagnetic force: In an electromagnetic release, the movement of the iron core can be converted into mechanical action. When the coil is energized, the iron core moves under the action of the magnetic field, and this movement can be transmitted to other mechanical parts, such as the ejector, to trigger the opening and closing of the switch.

[0069] Reduced leakage flux: The iron core helps reduce the leakage flux generated by the coil, that is, the magnetic flux escapes the coil without passing through the iron core, thereby improving the efficiency of the electromagnetic device.

[0070] Heat dissipation: The iron core can also help electromagnetic equipment dissipate heat, reduce eddy current and hysteresis losses caused by changes in the magnetic field, and enable the equipment to work stably for a longer period of time.

[0071] Mechanical support: The iron core also provides mechanical support for the coil, maintaining the shape and position of the coil to prevent deformation or displacement under current shock.

[0072] According to the embodiment of the present application, the main push rod 114 is arranged in the main coil 110 along the central axis of the main coil 110, and can move between the main push rod extended position and the main push rod retracted position along the central axis of the main coil 110. The main push rod 114 triggers the switch action at the main push rod extended position. The push rod is a key mechanical component in the electromagnetic release to realize the conversion of electromagnetic force into mechanical force and trigger the corresponding action. The design and function of the push rod is to ensure that the electromagnetic equipment can correctly control the switch state, such as the opening or closing of the circuit breaker, the connection or disconnection of the contactor, etc. Specifically, the functions and characteristics of the push rod are as follows:

[0073] Force transmission: The ejector pin is directly or indirectly connected to the iron core. When the electromagnetic coil is energized and generates a magnetic field, the iron core moves under the action of the magnetic field. Since the ejector pin is connected to the iron core, the displacement of the iron core is directly converted into the linear movement of the ejector pin, thereby converting the electromagnetic force into mechanical force.

[0074] Trigger switch: The other end of the top rod is designed to contact the mechanical mechanism of the switch (such as the contact operating mechanism). When the top rod moves to a specific position driven by the electromagnetic force, it directly pushes or pulls the switch mechanism, thereby triggering the switch to be turned on or off.

[0075] Precise control: The moving distance and speed of the ejector can be precisely controlled. By adjusting the current of the electromagnetic coil, the displacement of the core can be controlled, and then the movement of the ejector can be controlled, ensuring that the switch responds accurately when needed, meeting the requirements for switch action speed and accuracy in the power system.

[0076] Reliability: The structural design of the ejector needs to consider its ability to operate stably under high voltage or high current. It is usually made of high-strength materials to withstand the electromagnetic force and impact force during switch operation, ensuring that it can perform its tasks reliably under various working conditions.

[0077] According to an embodiment of the present application, the control core 122 is arranged in the control coil 120 along the central axis of the control coil 120, and the control coil 120 can receive current to generate a control magnetic field. The control pin 124 is arranged in the control coil 120 along the central axis of the control coil 120, and can move between a control pin extension position and a control pin retract position along the central axis of the control coil 120, wherein the control core can push the control pin 124 from the control pin retract position to the control pin extension position under the action of the electromagnetic force of the control magnetic field, and wherein the control pin 124 drives the main pin 114 from the main pin retract position to the main pin extension position during the process of moving from the control pin retract position to the control pin extension position. The pin acts as a bridge in the electromagnetic release, connecting the electromagnetic force and the mechanical movement to ensure that the electromagnetic device can efficiently, accurately and reliably control the switch state. In the specific implementation, the design of the pin needs to comprehensively consider the magnitude of the electromagnetic force, the characteristics of the switch mechanism, the durability of the material and the accuracy of the movement path to achieve the best operating effect.

[0078] Therefore, in this application, the main push rod is designed to be linked with the control push rod of another coil (control coil). This means that the electromagnetic force generated by the control coil is transmitted to the main push rod of the main coil through the control push rod, which eventually triggers the switch action, thereby achieving effective coordination of the two coils without sharing the iron core. The linearity of the rod movement avoids operational misalignment or mechanical wear caused by deviation of the movement path.

[0079] like Figure 2 and Figure 3 As shown, according to an exemplary embodiment of the present application, the control iron core 122 is slidably set in the control coil 120, and the control push rod 124 is fixed at one end of the control iron core 122, and the control iron core 122 can be pushed by the electromagnetic force of the control magnetic field to push the control push rod 124 to move from the control push rod retracted position to the control push rod extended position.

[0080] According to another exemplary embodiment of the present application, the control iron core 122 is a hollow ring and is fixedly disposed in the control coil 120, and the control push rod 124 is slidably disposed in the control iron core 122, and the electromagnetic force of the control magnetic field pushes the control push rod 124 to move from a control push rod retracted position to a control push rod extended position.

[0081] That is, there are two main configurations of the interaction between the control core 122 and the control coil 120, both of which are intended to achieve precise operation of the control pin 124 by controlling the magnetic field, thereby affecting the action of the DC switch.

[0082] Configuration 1: Sliding core and fixed ejector

[0083] The control core 122 is slidably disposed inside the control coil 120. This design allows the control core to move freely in the electromagnetic field generated by the control coil. When the control coil 120 is energized, the generated electromagnetic field acts on the control core 122, causing it to move along the central axis of the control coil. The control push rod 124 is fixed to one end of the control core 122, so that when the control core moves, it directly drives the control push rod 124 to move from its retracted position to its extended position. In this configuration, the movement of the control core is the direct power source for the movement of the control push rod, ensuring efficient conversion from electromagnetic signals to mechanical actions.

[0084] Second configuration: fixed core and sliding ejector

[0085] The control core 122 is designed to be in the shape of a hollow ring and is fixed inside the control coil 120. The control push rod 124 is slidably disposed inside the control core 122. When the control coil 120 receives current and generates a control magnetic field, although the control core 122 itself does not move, the electromagnetic force of the control magnetic field will directly act on the control push rod 124, pushing it to move from the retracted position to the extended position. The advantage of this design is that even if the core is fixed, the electromagnetic force can control the switch through the control push rod. At the same time, the hollow ring-shaped core can reduce material usage, reduce weight and cost, and provide sufficient space to accommodate the sliding of the push rod. In this configuration, the material of the push rod is an iron-containing material that can sense electromagnetic force.

[0086] In both configurations, the movement of the control push rod 124 is directly driven by the electromagnetic force of the control magnetic field, which ensures that the electromagnetic release can quickly respond to external signals and realize timely opening and closing of the switch. Whether the fixed push rod is driven by the sliding iron core or the sliding push rod inside the fixed iron core responds to the electromagnetic force, the electromagnetic interference problem that may be caused by the traditional shared iron core design is avoided, and the stability and reliability of the entire electromagnetic release device are improved.

[0087] like Figure 4 and Figure 5 As shown, according to an exemplary embodiment of the present application, the main coil 110 can receive current to generate a main magnetic field, and the main iron core 112 can push the main push rod 114 from a main push rod retracted position to a main push rod extended position under the action of the electromagnetic force of the main magnetic field.

[0088] According to an exemplary embodiment of the present application, the main iron core 112 is slidably set in the main coil 110, and the main top rod 114 is fixed at one end of the main iron core 112, and the main iron core 112 can be pushed by the electromagnetic force of the main magnetic field to push the main top rod 114 from the main top rod retracted position to the main top rod extended position, or the main iron core 112 is a hollow ring and is fixedly set in the main coil 110, and the main top rod 114 is slidably set in the main iron core 112, and the electromagnetic force of the main magnetic field pushes the main top rod 114 from the main top rod retracted position to the main top rod extended position.

[0089] The main coil 110 is one of the core components of the electromagnetic trip device. Its function is to receive the input current and generate the main magnetic field. The main coil is formed by a series of conductive wires wound on an iron core or other magnetic materials. When current passes through these wires, a magnetic field is generated. The strength and direction of this main magnetic field depends on the magnitude and direction of the current passing through the main coil.

[0090] The main iron core 112 is located inside the main coil 110 and is coaxially arranged with the main coil. The main iron core is usually made of a material with high magnetic permeability, such as silicon steel sheet, and its function is to enhance and concentrate the magnetic field generated by the main coil. When the main coil is energized and generates a main magnetic field, the main iron core will be affected by the electromagnetic force, which is sufficient to overcome any friction or other resistance, so that the main iron core moves from the retracted position to the extended position along the central axis of the main coil.

[0091] Under the action of electromagnetic force, the main top rod 114 moves from its retracted position to the extended position. This linear movement of the main top rod is achieved by converting electromagnetic force into mechanical force. In the operation of the high-voltage DC switch, the extension of the main top rod 114 can trigger the opening or closing mechanism of the switch to control the on and off of the high-voltage DC circuit.

[0092] This process describes the interaction between the main coil, the main iron core and the main mandrel in the electromagnetic tripping device, and how to use electromagnetic force to control the operation of the high-voltage DC switch. The current input of the main coil is the starting point of the operation of the electromagnetic tripping device. The main iron core moves in the magnetic field generated by the current, and the main mandrel converts this electromagnetic movement into a mechanical action of the switch opening and closing, forming a key control link for the operation of the high-voltage DC switch. This design not only improves the response speed and control accuracy of the electromagnetic tripping device, but also ensures the stability and reliability of the switch action in a high-voltage DC environment, meeting the high requirements of the power system for the high-voltage DC switch operating mechanism. However, when the main mandrel 114 cannot be driven by the main iron core 112 due to a fault or some other reasons and thus moves from its main mandrel retracted position to its main mandrel extended position, the control mandrel 124 can be used to push the main mandrel 114 based on the electromagnetic force of the control magnetic field provided by the control iron core 122, providing redundancy for the switch control capability, thereby improving the stability of the equipment.

[0093] Similar to the two main configurations of the interaction between the control core 122 and the control coil 120, the two main configurations of the interaction between the main core 112 and the main coil 110 can also adopt a sliding core and a fixed push rod or a fixed core and a sliding push rod, which will not be repeated here.

[0094] According to an exemplary embodiment of the present application, the control push rod 124 is coaxially connected to the main push rod 114. The implementation of the coaxial connection between the control push rod 124 and the main push rod 114 can adopt a variety of methods to achieve mechanical linkage between the two push rods, ensuring that they can perform relative displacement in a fixed axial direction. The following are some exemplary coaxial connection methods according to embodiments of the present application:

[0095] Contact connection: The end of the control push rod 124 is in direct contact with the end surface of the main push rod 114, or is in indirect contact via any one or all of the control iron core 122 and the main iron core 112. When the control push rod moves due to the electromagnetic force, it will directly push or pull the main push rod to move along the same axis.

[0096] Sleeve connection: The end of the control push rod 124 can be designed as a hollow sleeve structure, and a part of the main push rod 114 is inserted into the sleeve. When the electromagnetic force acts on the control push rod, the displacement of the sleeve will drive the axial movement of the main push rod.

[0097] Connecting rod mechanism or linkage arm: The two mandrels can be connected by a connecting rod or linkage arm, which is arranged along the same axis as the mandrel, so that the movement of the control mandrel can be transmitted to the main mandrel through the connecting rod or linkage arm.

[0098] Gear or rack connection: The end of the control push rod 124 can be designed as a gear, and the end of the main push rod 114 can be designed as a matching rack or gear. When the electromagnetic force drives the control push rod to rotate, the main push rod will also move along the axial direction through the meshing of the gear and the rack.

[0099] In actual design, the choice of coaxial connection method is based on specific equipment requirements, space constraints, cost considerations, and reliability requirements. For example, contact connection and sleeve connection are usually simple and low-cost, suitable for the electromagnetic release design of most high-voltage DC switch operating mechanisms, while gear or rack connection and screw connection provide more precise control and longer service life.

[0100] The above is only an example of a coaxial connection. It should be understood that other coaxial connection methods can be used as long as the control top rod 124 can push the main top rod 114 to move. It should be determined according to the actual design and needs. Selecting a suitable coaxial connection method is not only related to the response speed and control accuracy of the electromagnetic tripping device, but also directly affects its long-term operating reliability and maintenance cost. When designing the operating mechanism of a high-voltage DC switch, the impact of the top rod connection method on the overall performance should be fully considered to ensure that the switch can operate stably and reliably in a high-voltage DC environment. At the same time, by optimizing the connection method, the efficiency of the electromagnetic tripping device can also be improved, energy consumption can be reduced, and the overall performance of the entire high-voltage DC switch system can be improved.

[0101] Figure 6 It is a partial schematic diagram of a control coil installation mechanism of an electromagnetic tripping device according to an exemplary embodiment of the present application. Figure 8 is a schematic diagram of a control coil mounting plate of an electromagnetic trip device according to an exemplary embodiment of the present application. Fig.10 is a schematic diagram of an electromagnetic tripping device according to yet another exemplary embodiment of the present application.

[0102] like Figure 6 As shown, according to an exemplary embodiment of the present application, the main coil 110 is mounted on a main coil mounting plate 130, a first through hole 131 is provided on the main coil mounting plate 130 for allowing the main top rod 114 to pass through, and the electromagnetic tripping device 10 further includes a control coil mounting mechanism for mounting the control coil 120 to the axial position of the main coil 110. The control coil mounting mechanism includes: at least one adapter plate 151, a plurality of support rods 155 and at least one control coil mounting plate 157.

[0103] like Figure 8 and Fig.10As shown, the adapter plate 151 is disposed on the main coil mounting plate 130 and extends outward from the main coil mounting plate 130, and a plurality of first holes 153 are disposed on the adapter plate 151. Each of the plurality of support rods 155 is mounted on the adapter plate 151 through one of the plurality of first holes 153, and extends from the adapter plate 151 toward the direction of mounting the control coil 120. At least one control coil mounting plate 157, the control coil 120 is mounted on the control coil mounting plate 157, the control coil mounting plate 157 is provided with a second through hole 158 allowing the control push rod 124 to pass through, the control coil mounting plate is provided with a plurality of second holes 159, each support rod 155 installs the control coil mounting plate 157 at a mounting position on the plurality of support rods 155 through one of the plurality of second holes 159, and wherein the mounting position allows the control push rod 124 to drive the main push rod 114 to move from the main push rod retracted position to the main push rod extended position during the process of moving from the control push rod retracted position to the control push rod extended position.

[0104] Figure 6 The detailed design of the control coil installation mechanism, a key component of the electromagnetic tripping device 10 in this application, is shown. This is an important structure to ensure that the control coil 120 can be accurately positioned and effectively trigger the action of the main push rod 114. Specifically:

[0105] The main coil 110 is fixed on the main coil mounting plate 130, and the main coil mounting plate 130 includes a first through hole 131, which allows the main push rod 114 to freely pass through under the action of electromagnetic force to achieve its movement from the retracted position to the extended position. The control coil mounting mechanism is composed of at least one adapter plate 151, a plurality of support rods 155 and at least one control coil mounting plate 157, which is intended to fix the control coil 120 in a precise axial position relative to the main coil 110 to ensure independent operation and mutual coordination of the two coils.

[0106] The adapter plate 151 is fixed on the main coil mounting plate 130, and extends outside the device and is provided with a plurality of first holes 153. These holes are used to install the support rods 155, provide support points for the control coil 120, and ensure that the control coil can be stably arranged coaxially with the main coil.

[0107] Each support rod 155 is mounted on the adapter plate 151 through one of the first holes 153, extending from the adapter plate toward the control coil, supporting the control coil mounting plate 157, and ensuring the fixation and stability of the control coil. It should be understood that the number of support rods 155 and first holes 153 can be arbitrary, as long as a stable coil mounting position can be provided for the control coil mounting mechanism. In an exemplary embodiment of the present application, the number of support rods 155 and first holes 153 can be 3, 4, 5 or more, and the number of first holes 153 can be more than the number of support rods 155, thereby providing multiple mounting positions for mounting the support rods 155 and achieving a more stable installation.

[0108] The number and shape of the adapter plates 151 can adopt a variety of optional solutions, which provide installation positions for multiple support rods 155. Figure 6 As shown, two long strip-shaped plates are respectively arranged on both sides of the main coil mounting plate 130. The adapter plates 151 can also be more, such as 3, 4 or more plates, extending outward from the main coil mounting plate 130, and having a plurality of first holes 153 for mounting a plurality of support rods 155.

[0109] In addition, the number of adapter plate 151 may be one. Figure 7 Schematic diagram of an adapter plate of an electromagnetic tripping device according to an exemplary embodiment of the present application. Figure 7 As shown, the adapter plate 151 is a frame-shaped single plate with a plurality of first holes 153 formed thereon, and the hollow structure allows the ejector rod to pass through.

[0110] The control coil mounting plate 157 is provided with a control coil 120, and a second through hole 158 is provided to allow the control top rod 124 to pass through to realize its movement. In addition, there are multiple second holes 159 on the control coil mounting plate 157, which are connected to the support rods 155 through these holes to ensure the stable installation of the control coil mounting plate. Similar to the adapter plate 151, the number and shape of the control coil mounting plate 157 can adopt a variety of optional schemes, which provide installation positions for the control coil 120 and installation positions for multiple support rods 155. The control coil mounting plate 157 is as shown in FIG. Figure 8 As shown, two long strip-shaped plates are installed on both sides of a base plate. The control coil mounting plate 157 can also be more, such as 4, 5 or more plates, including a base plate for mounting the control coil 120, and multiple plates extending from the base plate to the outside, on which multiple second holes 159 for mounting multiple support rods 155 are arranged.

[0111] Fig. 9 Schematic diagram of a control coil mounting plate of an electromagnetic tripping device according to another exemplary embodiment of the present application. Fig. 9As shown, the control coil mounting plate 157 is a single plate on which a plurality of first holes 153 are provided, and a hollow structure (second through hole 158) allows the ejector pin to pass through.

[0112] The design of the control coil mounting mechanism ensures that the control coil 120 can be accurately mounted at the desired axial position, coaxial with the main coil 110, while allowing effective linkage between the control top rod and the main top rod. The stability, accuracy and reliability of this structure are the key to the design of the electromagnetic release in the high-voltage DC switch operating mechanism, which can ensure the stable and reliable operation of the switch in the high-voltage DC environment and meet the grid customers' countermeasure requirements for high reliability and independent operation of the electromagnetic release.

[0113] like Fig.10 As shown, according to an exemplary embodiment of the present application, a control coil mounting plate supporting portion 171 is provided on the support rod 155, and at least one of the multiple support rods 155 is provided on one side of the control coil mounting plate 157 of the adapter plate 151 for supporting the control coil mounting plate 157, and the support rod 155 passes through the second hole 159, and the support rod 155 is provided with a thread at one end of the control coil mounting plate 157, and the control coil mounting plate 157 is fixed to the control coil mounting plate supporting portion 171 via a bolt 173 via a thread.

[0114] In an exemplary embodiment of the present application, the control coil installation mechanism of the electromagnetic trip device 10 is designed to ensure that the stacked coil structure of the non-shared core can work stably and reliably. A control coil mounting plate supporting portion 171 is provided on the support rod 155. This design plays a supporting role between the adapter plate 151 and the control coil mounting plate 157, ensuring that the control coil mounting plate can be stably installed in the desired position. The control coil mounting plate supporting portion 171 is located on the support rod 155 and is in close contact with one side of the control coil mounting plate 157, forming a support for the control coil mounting plate. The support rod 155 passes through the second hole 159 on the control coil mounting plate, ensuring a stable connection between the control coil mounting plate and the support rod.

[0115] One end of the support rod 155 is also designed with a thread, which provides a mechanism for fixing the control coil mounting plate 157. The control coil mounting plate 157 is fixed to the control coil mounting plate supporting portion 171 through a bolt 173 connected to the thread on the support rod 155. This threaded connection not only ensures the stability of the mounting plate, but also facilitates subsequent adjustments.

[0116] like Fig.10As shown, according to an exemplary embodiment of the present application, the electromagnetic tripping device 10 also includes an adjustment mechanism for adjusting the axial relative position between the main coil 110 and the control coil 120, wherein the adjustment mechanism includes: at least one gasket 175, which is sleeved on the support rod 155 between the control coil mounting plate 157 and the control coil mounting plate supporting portion 171.

[0117] According to an exemplary embodiment of the present application, the control coil mounting plate receiving portion 171 is capable of axially moving on the support rod 155 through threads.

[0118] The electromagnetic trip device 10 further includes an adjustment mechanism, the purpose of which is to achieve axial relative position adjustment between the main coil 110 and the control coil 120 to optimize the independent operation of the two coils. The adjustment mechanism includes at least one gasket 175, which is sleeved on the support rod 155 and located between the control coil mounting plate 157 and the supporting portion 171. By increasing or decreasing the number of gaskets or adjusting the position of the gaskets, the axial distance between the two coils can be fine-tuned to ensure that there is no electromagnetic interference between the control coil and the main coil during operation, while maintaining sufficient mechanical linkage effect.

[0119] This adjustment mechanism is further enhanced by the axial movement capability of the control coil mounting plate support 171. The support 171 is threadedly connected to the support rod 155, which means that it can move axially on the support rod, allowing for finer position adjustment. This design not only increases the flexibility of the electromagnetic trip device, but also ensures that the coil can be precisely controlled under a variety of operating conditions.

[0120] Through the above-mentioned detailed design, the electromagnetic tripping device 10 of the present application can realize efficient control of the high-voltage DC switch operating mechanism, while meeting the countermeasure requirements of power grid customers for independent coil operation and avoiding the use of resistance and capacitance loops. The independent operation and precise adjustment between the control coil and the main coil ensure the stability and reliability of the electromagnetic tripping device in the high-voltage DC environment, reduce the failure rate and cost, and are an important innovation in the design of the high-voltage DC switch operating mechanism.

[0121] Fig.11 According to another aspect of the embodiment of the present application, a DC switch device 1 is provided, comprising: a switch 20, and an electromagnetic tripping device 10 according to any one of the embodiments of the present application, which triggers the switch 20 to operate by electromagnetic force.

[0122] Fig.11The overall design of the high-voltage DC switchgear 1 described in the present application is shown, which integrates the electromagnetic tripping device 10 with the switch 20 to achieve accurate control and protection of the high-voltage DC circuit. The key to this design is the coordinated work between the electromagnetic tripping device 10 and the switch 20 to ensure that the high-voltage DC switch can respond to the electromagnetic signal and perform the opening and closing operation.

[0123] The switch 20 is the core part of the high-voltage DC switch, including a contact system for connecting or disconnecting the high-voltage DC circuit. The electromagnetic trip device 10 is installed on or near the switch 20 to trigger the switch action by electromagnetic force. When the control coil 120 in the electromagnetic trip device 10 receives current and generates an electromagnetic field, the control top rod 124 moves under the action of the control magnetic field, and finally drives the main top rod 114 to move, triggering the opening and closing operation of the switch 20.

[0124] The integrated design of the electromagnetic tripping device 10 enables the high-voltage DC switch to respond quickly to electromagnetic signals and realize instant control of the circuit. This design not only improves the response speed and control accuracy of the switch, but also ensures the stability and reliability of the high-voltage DC switch under high voltage and high current conditions, meeting the high requirements of power grid customers for the high-voltage DC switch operating mechanism. At the same time, by adopting an independent coil stacking structure with a non-shared iron core, the use of a resistor and capacitor circuit in the secondary circuit is avoided, thereby reducing the overall cost and failure rate, and improving the overall performance of the high-voltage DC switch system.

[0125] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0126] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units or modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of modules or units, which can be electrical or other forms.

[0127] The units or modules described as separate components may or may not be physically separated, and the components displayed as units or modules may or may not be physical units or modules, that is, they may be located in one place, or may be distributed on multiple network units or modules. Some or all of the units or modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0128] In addition, each functional unit or module in each embodiment of the present application may be integrated into one processing unit or module, or each unit or module may exist physically separately, or two or more units or modules may be integrated into one unit or module. The above-mentioned integrated units or modules may be implemented in the form of hardware or in the form of software functional units or modules.

[0129] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., which can store program code.

[0130] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An electromagnetic tripping device (10), which triggers a switch action by electromagnetic force, characterized in that: include: A main coil (110) and a main iron core (112), wherein the main iron core (112) is arranged in the main coil (110) along a central axis of the main coil (110); A main push rod (114) is arranged in the main coil (110) along the central axis of the main coil (110), and is capable of moving between a main push rod extended position and a main push rod retracted position along the central axis of the main coil (110), wherein the main push rod (114) triggers the switch action at the main push rod extended position; A control coil (120) and a control iron core (122), wherein the control iron core (122) is arranged in the control coil (120) along the central axis of the control coil (120), and the control coil (120) is capable of receiving current to generate a control magnetic field; and A control push rod (124) is arranged in the control coil (120) along the central axis of the control coil (120), and is capable of moving between a control push rod extended position and a control push rod retracted position along the central axis of the control coil (120), wherein the control iron core is capable of pushing the control push rod (124) from the control push rod retracted position to the control push rod extended position under the action of the electromagnetic force of the control magnetic field, and, Wherein, in the process of the control push rod (124) moving from the control push rod retracted position to the control push rod extended position, the main push rod (114) is driven to move from the main push rod retracted position to the main push rod extended position, The main coil (110) is mounted on a main coil mounting plate (130), and a first through hole (131) is provided on the main coil mounting plate (130) for allowing the main push rod (114) to pass through, and the electromagnetic tripping device (10) further comprises a control coil mounting mechanism for mounting the control coil (120) to an axial position of the main coil (110), wherein the control coil mounting mechanism comprises: at least one adapter plate (151), the adapter plate (151) being arranged on the main coil mounting plate (130) and extending outward from the main coil mounting plate (130), and the adapter plate (151) being provided with a plurality of first holes (153); a plurality of support rods (155), each of the support rods (155) being mounted on the adapter plate (151) through one first hole (153) among the plurality of first holes (153), and extending from the adapter plate (151) in a direction in which the control coil (120) is mounted; and at least one control coil mounting plate (157), the control coil (120) being mounted on the control coil mounting plate (157), the control coil mounting plate (157) being provided with a second through hole (158) allowing the control top rod (124) to pass through, the control coil mounting plate being provided with a plurality of second holes (159), each of the support rods (155) being installed at a mounting position on the plurality of support rods (155) through one second hole (159) among the plurality of second holes (159), and The installation position allows the control push rod (124) to drive the main push rod (114) to move from the main push rod retracted position to the main push rod extended position during the process of moving from the control push rod retracted position to the control push rod extended position.

2. The electromagnetic tripping device (10) according to claim 1, characterized in that: The control iron core (122) is slidably disposed in the control coil (120), and the control push rod (124) is fixed to one end of the control iron core (122), and the control iron core (122) can be pushed by the electromagnetic force of the control magnetic field to push the control push rod (124) to move from the control push rod retracted position to the control push rod extended position; or The control iron core (122) is a hollow ring and is fixedly disposed in the control coil (120), and the control top rod (124) is slidably disposed in the control iron core (122), and the electromagnetic force of the control magnetic field pushes the control top rod (124) to move from a control top rod retracted position to a control top rod extended position.

3. The electromagnetic tripping device (10) according to claim 1 or 2, characterized in that: The main coil (110) can receive current to generate a main magnetic field, and the main iron core (112) can push the main push rod (114) to move from a main push rod retracted position to a main push rod extended position under the action of the electromagnetic force of the main magnetic field.

4. The electromagnetic tripping device (10) according to claim 3, characterized in that: The main iron core (112) is slidably disposed in the main coil (110), and the main push rod (114) is fixed to one end of the main iron core (112), and the main iron core (112) can be pushed by the electromagnetic force of the main magnetic field to push the main push rod (114) to move from a main push rod retracted position to a main push rod extended position; or The main iron core (112) is a hollow ring and is fixedly arranged in the main coil (110), and the main push rod (114) is slidably arranged in the main iron core (112), and the electromagnetic force of the main magnetic field pushes the main push rod (114) to move from the main push rod retracted position to the main push rod extended position.

5. The electromagnetic tripping device (10) according to claim 1 or 2, characterized in that: The control push rod (124) is coaxially connected to the main push rod (114).

6. The electromagnetic tripping device (10) according to claim 1, characterized in that: A control coil mounting plate supporting portion (171) is provided on the support rod (155), and is provided on at least one support rod (155) among the plurality of support rods (155) on one side of the control coil mounting plate (157) of the adapter plate (151), and is used to support the control coil mounting plate (157); and The support rod (155) passes through the second hole (159), and a thread is provided at one end of the support rod (155) on the control coil mounting plate (157). The control coil mounting plate (157) is fixed to the control coil mounting plate supporting portion (171) via a bolt (173) via the thread.

7. The electromagnetic tripping device (10) according to claim 6, characterized in that: It also includes an adjustment mechanism for adjusting the axial relative position between the main coil (110) and the control coil (120), wherein the adjustment mechanism includes: At least one gasket (175) is sleeved on the support rod (155) between the control coil mounting plate (157) and the control coil mounting plate supporting portion (171).

8. The electromagnetic tripping device (10) according to claim 7, characterized in that: The control coil mounting plate supporting portion (171) is capable of axially moving on the support rod (155) via the thread.

9. A DC switchgear (1), comprising: a switch (20), and An electromagnetic tripping device (10) according to any one of claims 1 to 8, which triggers the switch (20) to operate by electromagnetic force.

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