Electromagnetic repulsion device and method for driving a control valve

Abstract

The application discloses an electromagnetic repulsion device and method for driving a control valve, wherein a control system controls a discharge circuit to start discharging to a repulsion coil assembly; when the repulsion coil is electrified, an axial magnetic field is generated; a repulsion disc generates an eddy current electromagnetic field in the opposite direction of the magnetic field of the repulsion coil assembly; the repulsion disc is further pushed to move downward along a transmission rod, forming an electromagnetic repulsion mechanism; the response time of the valve switching controlled by the electromagnetic repulsion enables the response speed of the whole device to be fast and the initial speed to be high; meanwhile, the reset spring assembly cooperates with the electromagnetic repulsion, so that two circuit playback can be realized; after the first discharge circuit is discharged, the repulsion movement assembly is actuated and reset; the second discharge circuit can provide energy for secondary tripping in a short time, thereby meeting the requirements of a high-voltage hydraulic spring type circuit breaker reclosing, improving the tripping speed of the high-voltage hydraulic spring type circuit breaker, and enabling the device to be applied to higher voltage grades and larger stroke scenes.

Description

Technical Field

[0001] This invention belongs to the field of control valve drive technology, and relates to an electromagnetic repulsion device and method for driving control valves. Background Technology

[0002] Ultra-high voltage circuit breakers are critical switching devices in power machinery, playing a dual role in power grid protection and control. They not only interrupt and close no-load and load currents in high-voltage circuits, but also, in conjunction with protection and automatic devices, rapidly interrupt fault currents when system faults occur, minimizing the scope of power outages, preventing the escalation of accidents, and ensuring the safe operation of the system. During circuit breaker operation, the hydraulic mechanism must drive the arc-extinguishing mechanism at a certain speed within a specified time to disconnect and close the power grid, ensuring its normal and safe operation. The opening and closing speed and closing time characteristics of the hydraulic mechanism are important design parameters and crucial indicators for evaluating circuit breaker performance.

[0003] Hydraulic spring-type high-voltage circuit breakers have advantages such as high energy conversion efficiency, compact structure, and high reliability, and are widely used in high-voltage and high-current scenarios. Electromagnetic repulsion mechanisms possess excellent speed and sensitivity, with short mechanical delay time and high initial speed. Their working principle is as follows: a pre-charged capacitor discharges into the repulsion coil, generating a pulse current in the coil. This pulse current induces an alternating magnetic field around the coil, generating opposing eddy currents on the repulsion disk. The magnetic field generated by the eddy currents interacts with the magnetic field generated by the coil, producing a repulsive force that drives the transmission rod.

[0004] In hydraulic spring-operated circuit breakers, the response speed of the control valve used to control the operation mechanism is limited by its pilot solenoid valve. For example, patent application No. 201420837151.8 discloses a hydraulic electromagnetic reversing mechanism for a hydraulic spring operating device in a high-voltage circuit breaker, but its reversing speed still depends on the pilot reversing valve, resulting in a slow response speed. On the other hand, electromagnetic repulsion mechanisms rely primarily on inertia in the later stages of motion, making them currently unsuitable for applications requiring higher voltage levels and greater strokes. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art where electromagnetic reversing mechanisms rely on pilot reversing valves, have slow response speeds, and rely mainly on inertia in the later stages of electromagnetic repulsion mechanisms, making them unsuitable for applications with higher voltage levels and longer strokes. This invention provides an electromagnetic repulsion device and method for driving control valves.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] An electromagnetic repulsion device for driving a control valve includes a transmission rod, wherein the transmission rod is provided with a return spring assembly, an upper fastening guide sleeve, a repulsion disc, a lower fastening guide sleeve, a limiting member, and a gap adjusting member in sequence from top to bottom;

[0008] The transmission rod is provided with a control valve core extension end below it. The gap adjustment component is used to adjust the gap between the transmission rod and the control valve core extension end. When the transmission rod moves downward, the lower end of the transmission rod contacts the control valve core extension end.

[0009] A repulsion coil assembly is fitted on the outside of the upper fastening guide sleeve. The repulsion coil assembly is connected to the control system and is located above the repulsion disk.

[0010] A further improvement of the present invention is that:

[0011] The limiting component is a fastening nut, which abuts against the lower end of the lower fastening guide sleeve.

[0012] The gap adjusting component is an adjusting nut, which is located at the lower end of the transmission rod.

[0013] Both the reset spring assembly and the repulsion coil assembly are mounted via a connecting assembly;

[0014] The connecting assembly includes an upper connecting plate, a lower connecting plate, and a valve body connecting plate connected sequentially from top to bottom;

[0015] The upper connecting plate is sleeved on the outside of the upper fastening guide sleeve, the reset spring assembly is disposed on the upper end of the upper connecting plate, and the repulsion coil assembly is disposed between the upper connecting plate and the lower connecting plate;

[0016] The lower connecting plate is sleeved on the outside of the lower fastening guide sleeve;

[0017] The valve body connecting plate is sleeved on the outside of the protruding end of the control valve core.

[0018] The upper connecting plate and the lower connecting plate are connected by an upper support column;

[0019] The lower connecting plate and the valve body connecting plate are connected by a lower support column.

[0020] The repulsion coil assembly includes a coil disk, and a repulsion coil is disposed inside the coil disk;

[0021] The repulsion coil can abut against the upper end of the repulsion disk.

[0022] The reset spring assembly includes a spring housing, a reset spring is disposed inside the spring housing, the reset spring is wrapped around the outside of the transmission rod, and the upper end of the reset spring is connected to the upper end of the transmission rod.

[0023] The lower end of the spring housing is connected to the upper connecting plate.

[0024] A spring end plate is provided at the lower end of the spring housing, and the spring end plate is connected to the upper connecting plate;

[0025] The lower end of the reset spring is connected to the spring end plate.

[0026] The upper end of the transmission rod is provided with a disc structure, the diameter of which is larger than the diameter of the transmission rod, and the disc structure is connected to the upper end of the return spring.

[0027] A method of using an electromagnetic repulsion device for driving a control valve includes the following steps:

[0028] Upon receiving the trip signal, the control system initiates discharge of the discharge circuit to the repulsion coil assembly.

[0029] Driven by current, the repulsion coil assembly generates an axial magnetic field, and the repulsion disk generates an eddy current electromagnetic field in the opposite direction to the magnetic field of the repulsion coil assembly, which in turn pushes the transmission rod downward through the repulsion disk;

[0030] When the transmission rod moves downward, the return spring assembly contracts and presses, and the lower end of the transmission rod contacts the protruding end of the control valve core, pushing the control valve core to move and completing the reversal of the control valve.

[0031] After the discharge is complete, the reset spring assembly resets, driving the transmission rod to move upward until the repulsion disk resets.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] This invention discloses an electromagnetic repulsion device for driving a control valve. The device is based on a guide rod, with a return spring assembly at the upper end and a control valve core extension at the lower end. A repulsion disk is mounted on the guide rod, and the repulsion disk can cooperate with a repulsion coil assembly. When the repulsion coil is energized, it generates an axial magnetic field. The repulsion disk generates an eddy current electromagnetic field opposite in direction to the magnetic field of the repulsion coil assembly, thus generating a repulsive force between the repulsion disk and the repulsion coil. This force pushes the repulsion disk downwards along the transmission rod, forming an electromagnetic repulsion mechanism. By controlling the valve switching response time through electromagnetic repulsion, the entire device achieves fast switching response and high initial velocity. The repulsion coil assembly is positioned above the repulsion disk, with a certain length of air gap reserved between them to ensure insulation strength and prevent direct collision during operation. Simultaneously, the reset spring assembly works in conjunction with the electromagnetic repulsion to enable two circuit replays. After the first discharge circuit discharges, the repulsion motion assembly activates and resets. The second discharge circuit provides energy for secondary opening within a short time, meeting the reclosing requirements of the high-voltage hydraulic spring circuit breaker and improving its opening speed. This allows the device to be applied to scenarios with higher voltage levels and greater stroke.

[0034] This invention discloses a method for using an electromagnetic repulsion device for driving a control valve. Upon receiving a tripping signal, the control system initiates a discharge circuit to discharge to the repulsion coil assembly. When the repulsion coil is energized, an axial magnetic field is generated. The repulsion disk generates an eddy current electromagnetic field opposite in direction to the magnetic field of the repulsion coil assembly, thus generating a repulsive force between the repulsion disk and the repulsion coil. This force pushes the repulsion disk downwards along the transmission rod, forming an electromagnetic repulsion mechanism. By controlling the valve's switching response time through electromagnetic repulsion, the entire device achieves fast switching response and high initial speed. Simultaneously, the reset spring assembly cooperates with the electromagnetic repulsion to enable two circuit replays. After the first discharge circuit discharges, the repulsion motion assembly activates and resets. The second discharge circuit provides energy for secondary tripping within a short time, meeting the reclosing requirements of high-pressure hydraulic spring circuit breakers. This improves the tripping speed of high-pressure hydraulic spring circuit breakers, enabling the device to be applied to scenarios with higher voltage levels and greater stroke. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is an overall structural diagram of the present invention;

[0037] in:

[0038] 1-Reset spring assembly; 101-Spring housing; 102-Reset spring; 103-Spring end plate;

[0039] 2-Connecting assembly; 201-Upper support column; 202-Upper connecting plate; 203-Lower connecting plate; 204-Lower support column; 205-Valve body connecting plate;

[0040] 3-Repulsion coil assembly; 301-Coil disc; 302-Repulsion coil;

[0041] 4-Repulsion motion assembly; 401-Transmission rod; 402-Upper fastening guide sleeve; 403-Repulsion disc; 404-Lower fastening guide sleeve; 405-Fastening nut; 406-Adjusting nut;

[0042] 5-Control System. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0049] The present invention will now be described in further detail with reference to the accompanying drawings:

[0050] See Figure 1 The present invention discloses an electromagnetic repulsion device for driving a control valve, comprising a spring reset assembly 1, a connecting assembly 2, a repulsion coil assembly 3, a repulsion motion assembly 4, and a control system 5.

[0051] Specifically, it includes:

[0052] This invention discloses an electromagnetic repulsion device for driving a control valve, comprising a transmission rod 401. From top to bottom, the transmission rod 401 is sequentially equipped with a reset spring assembly 1, an upper fastening guide sleeve 402, a repulsion disc 403, a lower fastening guide sleeve 404, a limiting member, and a gap adjusting member. A control valve core extension end is located below the transmission rod 401. The gap adjusting member is used to adjust the gap between the transmission rod 401 and the control valve core extension end. When the transmission rod 401 moves downward, its lower end contacts the control valve core extension end. A repulsion coil assembly 3 is sleeved on the outside of the upper fastening guide sleeve 402. The repulsion coil assembly 3 is connected to a control system 5 and is located above the repulsion disc 403.

[0053] Furthermore, in this embodiment of the invention, the limiting member is a fastening nut 405, which abuts against the lower end of the lower fastening guide sleeve 404. The fastening nut 405 is used to restrict the axial movement of the lower fastening guide sleeve 404 and the repulsion disk 403.

[0054] Furthermore, in this embodiment of the invention, the gap adjustment component is an adjusting nut 406, which is disposed at the lower end of the transmission rod 401. The adjusting nut 406 is used to adjust the gap between the repulsive motion component 4 and the extended end of the control valve core.

[0055] Furthermore, in this invention, both the reset spring assembly 1 and the repulsion coil assembly 3 are mounted via the connecting assembly 2, and the specific connection structure is as follows:

[0056] The reset spring assembly 1 includes a spring housing 101, inside which a reset spring 102 is disposed. The reset spring 102 is pre-compressed in the spring housing 101 to provide a reset force. The spring housing 101 is connected to a spring end plate 103 at one end, and the lower end of the reset spring 102 abuts against the spring end plate 103.

[0057] Furthermore, the return spring 102 is located outside the transmission rod 401, and a disc structure is provided at the upper end of the transmission rod 401 to transmit the return force. The lower end of the disc structure abuts against the return spring 102, and the diameter of the disc structure is larger than the diameter of the transmission rod 401.

[0058] The connecting assembly 2 includes an upper connecting plate 202, a lower connecting plate 203, and a valve body connecting plate 205 connected sequentially from top to bottom.

[0059] The repulsion coil assembly 3 includes a coil disk 301 and a repulsion coil 302.

[0060] Specifically, the spring end plate 103 is connected to the upper end of the upper connecting plate 202, the coil disk 301 is connected to the lower end of the upper connecting plate 202, and the repulsion coil 302 is cast into the coil disk 301 to connect two sets of discharge circuits to meet the reclosing requirements.

[0061] The lower connecting plate 203 is used to connect the valve body connecting plate 205 and limit its stroke. The repulsion coil assembly 3 is located between the upper connecting plate 202 and the lower connecting plate 203. The upper connecting plate 202 and the lower connecting plate 203 are connected by an upper support column 201, which passes through the upper connecting plate 202 and the lower connecting plate 203 from top to bottom. The lower connecting plate 203 and the valve body connecting plate 205 are connected by a lower support column 204, which passes through the lower connecting plate 203 and the valve body connecting plate 205 from top to bottom. There are two upper support columns 201 and two lower support columns 204.

[0062] The coil disc 301 is fitted on the outside of the upper fastening guide sleeve 402, and the lower connecting plate 203 is fitted on the outside of the lower fastening guide sleeve 404.

[0063] Furthermore, in this embodiment, the repulsion coil 302 is made of flat copper wire wound into a single-layer coil structure. For the single-layer coil structure, the inner inlet and outlet wires of the coil winding are folded to the outer side and then cast into shape to ensure that the inlet and outlet wires of the coil casting are placed on the outer cylindrical surface of the coil.

[0064] Furthermore, in this embodiment, the repulsion disk 403 is made of non-ferromagnetic metal materials such as aluminum alloy or copper with high electrical conductivity.

[0065] Furthermore, in this embodiment, the specific structure of the control system 5 is as follows:

[0066] The control system 5 includes a power supply module, a signal processing module, a control module, a charging module, a manual discharge module, a trigger module, and a discharge circuit;

[0067] The power module is used to supply power to the discharge capacitor and the control system.

[0068] The signal processing module is used to process the tripping signal;

[0069] The control module is used to control the charging and discharging of the discharge capacitor and the triggering of the discharge circuit;

[0070] The trigger module is used to send a trigger signal to turn on the thyristor in the discharge circuit, thus activating the punishment device.

[0071] Compared with current high-pressure hydraulic spring circuit breakers and electromagnetic repulsion mechanism circuit breakers, this invention combines the reset spring assembly with the repulsion motion assembly 4. On the one hand, the electromagnetic repulsion mechanism drives the control valve to switch, which improves the response time of the control valve switching. The device has a fast switching response speed and a high initial speed. The reset spring assembly meets the advantages of high energy conversion efficiency and high reliability of the device under high pressure and long stroke, and significantly improves the opening speed of the high-pressure hydraulic spring circuit breaker.

[0072] The present invention also discloses a method of using an electromagnetic repulsion device for driving a control valve, comprising the following steps:

[0073] When the control valve needs to be switched, when the trip signal arrives, the signal is processed by the signal processing module and then transmitted to the control module. The control module outputs a signal to the trigger module. At this time, the trigger module sends a trigger signal to turn on the thyristor in the discharge circuit and the capacitor begins to discharge.

[0074] The repulsion coil 302 generates an axial magnetic field as current flows through it. Eddy current electromagnetic fields opposite to the magnetic field of the repulsion coil 302 are induced in the repulsion disk 403. Electromagnetic repulsion is generated between the repulsion coil 302 and the repulsion disk 403, which drives the repulsion motion component 4 to move.

[0075] The lower end of the transmission rod 401 contacts the protruding end of the control valve core, pushing the valve core to move, thereby completing the reversing of the control valve;

[0076] Once the discharge is complete, the repulsive motion component resets under the action of the reset spring component.

[0077] As the repulsive motion component 4 moves downward, the return spring 102 continues to be compressed, and the return force increases continuously. This return force not only enables the repulsive motion component 4 to return to its original position, but also provides a certain buffering force in the latter half of the movement of the repulsive motion component 4.

[0078] In this embodiment, the repulsion coil 302 is connected to two sets of discharge circuits to meet the reclosing requirements of the high-pressure hydraulic spring circuit breaker. Specifically, after the first discharge circuit discharges, the repulsion motion component moves and resets, and the second discharge circuit can provide energy for secondary opening in a short time to meet the reclosing requirements of the high-pressure hydraulic spring circuit breaker.

[0079] Furthermore, in this embodiment, when the repulsive motion component 4 is in the initial position, a certain length of air gap is reserved between the repulsive coil 302 and the repulsive disk 403 to ensure insulation strength and prevent direct collision between the repulsive coil component 3 and the repulsive disk 403 during operation. This gap is achieved through the spring housing 101 at the top and the disc structure at the top of the transmission rod 401.

[0080] The device disclosed in this invention overcomes the disadvantage of slow response speed of hydraulic spring circuit breaker control valve. Through the cooperation of the reset spring assembly and the repulsive motion assembly 4, the device has the advantages of high energy conversion efficiency and high reliability under high pressure and long stroke, which significantly improves the opening speed of high-pressure hydraulic spring circuit breaker.

[0081] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electromagnetic repulsion device for driving a control valve, characterized in that, The transmission rod (401) includes, from top to bottom, a reset spring assembly (1), an upper fastening guide sleeve (402), a repulsion plate (403), a lower fastening guide sleeve (404), a limiting member, and a gap adjusting member. The transmission rod (401) is provided with a control valve core extension end below it. The gap adjustment component is used to adjust the gap between the transmission rod (401) and the control valve core extension end. When the transmission rod (401) moves downward, the lower end of the transmission rod (401) contacts the control valve core extension end. The upper fastening guide sleeve (402) is fitted with a repulsion coil assembly (3), the repulsion coil assembly (3) is connected to the control system (5), and the repulsion coil assembly (3) is located above the repulsion disk (403); The reset spring assembly (1) and the repulsion coil assembly (3) are both installed via the connecting assembly (2); The connecting assembly (2) includes an upper connecting plate (202), a lower connecting plate (203), and a valve body connecting plate (205) connected from top to bottom. The upper connecting plate (202) is sleeved on the outside of the upper fastening guide sleeve (402), the reset spring assembly (1) is disposed on the upper end of the upper connecting plate (202), and the repulsion coil assembly (3) is disposed between the upper connecting plate (202) and the lower connecting plate (203); The lower connecting plate (203) is sleeved on the outside of the lower fastening guide sleeve (404); The valve body connecting plate (205) is sleeved on the outside of the extended end of the control valve core; The upper connecting plate (202) and the lower connecting plate (203) are connected by an upper support column (201); The lower connecting plate (203) and the valve body connecting plate (205) are connected by a lower support column (204); The repulsion coil assembly (3) includes a coil disk (301), and a repulsion coil (302) is disposed inside the coil disk (301). The repulsion coil (302) can abut against the upper end of the repulsion disk (403); The reset spring assembly (1) includes a spring housing (101), and a reset spring (102) is provided inside the spring housing (101). The reset spring (102) is wrapped around the outside of the transmission rod (401), and the upper end of the reset spring (102) is connected to the upper end of the transmission rod (401). The lower end of the spring housing (101) is connected to the upper connecting plate (202); The upper end of the transmission rod (401) is provided with a disc structure, the diameter of which is larger than the diameter of the transmission rod (401), and the disc structure is connected to the upper end of the return spring (102); It also includes the following steps: When the control system (5) receives the trip signal, the control system (5) controls the discharge circuit to start discharging to the repulsion coil assembly (3); The repulsion coil assembly (3) generates an axial magnetic field under the drive of the current, and the repulsion disk (403) generates an eddy current electromagnetic field opposite to the magnetic field of the repulsion coil assembly (3), which in turn pushes the transmission rod (401) downward through the repulsion disk (403); When the transmission rod (401) moves downward, the return spring assembly (1) contracts and presses, and the lower end of the transmission rod (401) contacts the protruding end of the control valve core, pushing the control valve core to move and completing the control valve reversal; After the discharge is completed, the reset spring assembly (1) resets, driving the transmission rod (401) to move upward until the repulsion disk (403) resets.

2. The electromagnetic repulsion device for driving a control valve according to claim 1, characterized in that, The limiting component is a fastening nut (405), which abuts against the lower end of the lower fastening guide sleeve (404).

3. The electromagnetic repulsion device for driving a control valve according to claim 1, characterized in that, The gap adjustment component is an adjusting nut (406), which is located at the lower end of the transmission rod (401).

4. The electromagnetic repulsion device for driving a control valve according to claim 1, characterized in that, A spring end plate (103) is provided at the lower end of the spring housing (101), and the spring end plate (103) is connected to the upper connecting plate (202); The lower end of the reset spring (102) is connected to the spring end plate (103).

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