Voltage transformer on-off control device and working method thereof

Abstract

The invention discloses a voltage transformer on-off control device and a working method thereof. The voltage transformer on-off control device comprises an insulating shell, a static contact assembly, a moving contact assembly and a positioning connecting rod mechanism, one end of the static contact assembly is arranged in one end of the insulating shell in a penetrating mode, and the other end of the static contact assembly is used for being electrically connected with a pole-mounted circuit breaker; one end of the moving contact assembly is movably arranged in the insulating shell, one end of the moving contact assembly is in on-off connection with one end of the static contact assembly, the other end of the moving contact assembly is arranged at the other end of the insulating shell in a penetrating manner, and the other end of the moving contact assembly is used for being electrically connected with an electronic transformer and connected with external insulating operation equipment; and the positioning connecting rod mechanism is movably arranged in the insulating shell, is connected with the moving contact assembly, and is used for driving the moving contact assembly and the static contact assembly to be connected and disconnected and positioned. The working method is based on the voltage transformer on-off control device.

Description

Technical Field

[0001] This invention relates to the field of power maintenance technology, and in particular to a voltage transformer on / off control device and its operating method. Background Technology

[0002] In distribution network automation systems, pole-mounted circuit breakers rely on voltage transformers as the power source for their operating mechanisms and controllers. Typically, the high-voltage side of this voltage transformer is connected in parallel to the power supply side of the pole-mounted circuit breaker via leads.

[0003] Currently, the industry commonly uses drop-out fuses as the on / off control and protection device for voltage transformers. However, this existing technology has inherent defects: First, it has low safety and is prone to failure. Drop-out fuses are not fully insulated; although their upper and lower contacts are protected, there are still exposed live parts, which can easily cause electric shock accidents. Furthermore, when small animals such as squirrels or snakes climb onto these contacts, they can cause phase-to-phase short circuits or single-phase ground faults, leading to unexpected power outages. Second, it has poor reliability. The porcelain bushing of the fuse has a different coefficient of thermal expansion than the metal components that hold it in place. During long-term operation, temperature changes can cause it to break, leading to ground faults and affecting power supply reliability. Third, it has low fault isolation efficiency. When a voltage transformer malfunctions... Afterwards, regardless of whether the main line has been de-energized, maintenance personnel must climb the pole to work and isolate the fault. This requires going through steps including power outage, voltage testing, grounding wire installation, and pole climbing to remove the lead wire, which takes 1 to 2 minutes and cannot achieve rapid isolation. The fault continues to threaten the safe operation of the power grid. Fourth, live-line work is high-risk and inconvenient. When performing live-line work such as replacing pole-mounted circuit breakers, the voltage transformer must be disconnected first, and according to safety regulations, an arc suppression switch must be used. However, the installation space between the circuit breaker pole and the voltage transformer is usually extremely narrow, which brings great difficulties to the implementation of safety measures such as insulation shielding and seriously threatens the safety of the workers. Summary of the Invention

[0004] The purpose of this invention is to provide a voltage transformer on / off control device and its operating method, in order to solve at least one of the problems mentioned in the background art, such as the ease with which exposed live parts and small animals can cause line faults, low fault isolation efficiency when power is not interrupted, high risk of live work, and inconvenience of operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A first aspect of the present invention provides a voltage transformer on / off control device, comprising: Insulating shell; A stationary contact assembly, one end of which is inserted into one end of the insulating shell, and the other end of which is used for electrical connection to a post-connected circuit breaker; A moving contact assembly, one end of which is movably disposed within the insulating shell, and one end of which is connected to one end of the stationary contact assembly in a way that allows for both switching on and off. The other end of the moving contact assembly passes through the other end of the insulating shell and is used for electrical connection to an electronic transformer and connection to external insulating operating equipment. A positioning linkage mechanism is movably disposed within the insulating shell. The positioning linkage mechanism is connected to the moving contact assembly and is used to drive the moving contact assembly to switch on and off with the stationary contact assembly and to position it.

[0006] Optionally, the positioning linkage mechanism includes a reinforcing metal frame, a positioning connecting plate, a guide connecting plate, and a spring. The reinforcing metal frame is fixedly connected to the insulating shell. One end of the positioning connecting plate is rotatably connected to one end of the reinforcing metal frame and one end of the spring. The other end of the positioning connecting plate is rotatably connected to the middle of the guide connecting plate. One end of the guide connecting plate is rotatably connected to the moving contact assembly. The other end of the guide connecting plate is movably mounted on the other end of the reinforcing metal frame. The other end of the guide connecting plate is rotatably connected to the other end of the reinforcing metal frame and the other end of the spring.

[0007] Optionally, one end of the reinforcing metal frame is located on one side of the moving contact assembly, and a fixing rod passes through one end of the reinforcing metal frame. One end of the fixing rod is connected to one side of the insulating shell, and the other end of the fixing rod is connected to the other side of the insulating shell. One end of the positioning connecting plate and one end of the spring are sleeved on the fixing rod. The other end of the reinforcing metal frame is located on the other side of the moving contact assembly, and a first guide groove is provided on the other end of the reinforcing metal frame. A movable guide pin passes through the first guide groove. One end of the guide pin is slidably connected to one side of the insulating shell, and the other end of the guide pin is slidably connected to the other side of the insulating shell. The other end of the guide connecting plate and the other end of the spring are sleeved on the guide pin.

[0008] Optionally, the number of positioning connecting plates and the number of guide connecting plates are both two, with the positioning connecting plates arranged in parallel and spaced apart, and the guide connecting plates arranged in parallel and spaced apart.

[0009] Optionally, the moving contact assembly includes a moving connecting rod contact, an insulating push-pull rod, a threaded lead wire, and a moving contact side lead wire. The moving connecting rod contact is movably disposed within the insulating shell. One end of the moving connecting rod contact is connected to one end of the stationary contact assembly in a switchable manner. The other end of the moving connecting rod contact is drivenly connected to one end of the insulating push-pull rod. Both the other end of the moving connecting rod contact and one end of the insulating push-pull rod are rotatably connected to the positioning linkage mechanism. The other end of the insulating push-pull rod is movably inserted through the other end of the insulating shell. One end of the threaded lead wire is electrically connected to the other end of the moving connecting rod contact. One end of the moving contact side lead wire is electrically connected to the other end of the threaded lead wire. The other end of the moving contact side lead wire is inserted through the insulating shell.

[0010] Optionally, the insulating shell includes an insulating chamber, a connecting pipe, a guide pipe, and an insulating cover. The insulating chamber is equipped with the positioning linkage mechanism. One end of the insulating chamber is connected to one end of the connecting pipe. One end of the movable contact assembly is located in one end of the connecting pipe and one end of the insulating chamber. One end of the stationary contact assembly is located in the other end of the connecting pipe. The other end of the insulating chamber is connected to the guide pipe. The other end of the movable contact assembly passes through both the guide pipe and the other end of the insulating chamber. The insulating cover is sealed on the insulating chamber and is slidably connected to the positioning linkage mechanism.

[0011] Optionally, both the insulating chamber and the insulating cover are triangular in shape. The first end of the insulating chamber is connected to one end of the connecting pipe, and the second end of the insulating chamber is connected to the guide pipe. The other end of the moving contact assembly passes through the second and third ends of the insulating chamber. A second guide groove is provided on the inner side of the insulating chamber, and a third guide groove is provided on the inner side of the insulating cover. The movable positioning linkage mechanism passes through both the second and third guide grooves.

[0012] Optionally, the stationary contact assembly includes a stationary contact and a stationary contact side lead wire. One end of the stationary contact is disposed inside one end of the insulating shell, and the other end of the stationary contact passes through the insulating shell. The other end of the stationary contact is connected to the stationary contact side lead wire.

[0013] Optionally, it also includes a first insulating post, a second insulating post, and a support frame, with the first insulating post and the second insulating post spaced apart. One end of the first insulating post is connected to one end of the insulating shell, one end of the second insulating post is connected to the other end of the insulating shell, and the other ends of the first insulating post and the second insulating post are both connected to the support frame.

[0014] A second aspect of the present invention provides a method for operating a voltage transformer switching control device, the voltage transformer switching control device based on any of the above embodiments comprising: In the initial state, the other end of the moving contact assembly is connected to the electronic transformer, and the other end of the stationary contact assembly is connected to the pole-mounted circuit breaker. The other end of the moving contact assembly is moved, and the other end of the moving contact assembly drives one end of the moving contact assembly and the positioning linkage mechanism to move. When the positioning linkage mechanism moves past the critical position, the positioning linkage mechanism drives the moving contact assembly to move faster, so that the moving contact assembly and the stationary contact assembly are connected or disconnected faster. When the moving contact assembly and the stationary contact assembly are connected or disconnected from the stationary contact assembly until the positioning linkage mechanism is reset, the positioning linkage mechanism drives the moving contact assembly to be positioned. The voltage transformer is energized when the moving contact assembly is connected to the stationary contact assembly, and de-energized when the moving contact assembly is disconnected from the stationary contact assembly.

[0015] The beneficial effects of this invention are: The voltage transformer on / off control device of the present invention solves the technical problems of existing technologies, such as the susceptibility of circuit faults caused by exposed live parts and contact with small animals, low fault isolation efficiency when power is not interrupted, high risk of live work, and inconvenient operation. It achieves the following beneficial effects: by using a fully insulated shell to completely seal the stationary contact assembly, moving contact assembly, and positioning linkage mechanism, it eliminates the risk of electric shock and animal-induced short circuits caused by exposed live parts in traditional drop-out fuses, improving the safety and reliability of equipment operation. Simultaneously, the built-in positioning linkage mechanism ensures that the moving contact is in contact with the stationary contact... When connected or disconnected, the transformer accurately and quickly reaches the predetermined position and locks stably, avoiding poor contact or accidental disconnection caused by vibration or misoperation. This ensures the accuracy and consistency of the connection and disconnection operations, allowing maintenance personnel to safely and conveniently complete the switching and fault isolation operations of the voltage transformer from the ground using only insulated operating equipment without having to climb poles. This reduces the fault handling time that originally required several minutes to seconds, improving the operation and maintenance efficiency and power supply reliability of distribution lines. It provides a safer, more efficient, and more reliable voltage transformer control solution for the construction of distribution network automation.

[0016] Furthermore, through the coordinated operation of the reinforcing metal frame, positioning plate, guide plate, and spring, precise guidance and reliable positioning of the moving contact assembly during its movement are achieved. When the moving contact assembly is in motion, the guide plate slides along the reinforcing metal frame, and through the lever action of the positioning plate, a stable over-dead-point mechanism is formed with the cooperation of the spring. This allows the moving contact to obtain a rapid movement speed at the moment of connection or separation with the stationary contact, reducing arc erosion. At the same time, it ensures stable self-locking at both the connection and separation positions, preventing malfunctions caused by vibration or external forces. This results in smooth operation of the device, low operating force, long mechanical life, and improved reliability and accuracy of on / off control.

[0017] Furthermore, the unique arrangement of the fixing rod and guide pin achieves structural stability and precise movement. The fixing rod, as the fixed fulcrum for the positioning plate and spring, ensures the reliability of force transmission. The sliding engagement of the guide pin with the first guide groove provides a precise movement trajectory for the guide plate, making the movement of the moving contact assembly more stable and controllable. The guide pin and fixing rod enable the spring force to form an effective torque balance through the guide pin and fixing rod, generating obvious force feedback when passing through the critical position, helping the operator perceive the operating position, while ensuring that the contact obtains optimal motion characteristics at the moment of connection and separation, thus improving the mechanical life and operational reliability of the device.

[0018] Furthermore, by adopting a symmetrical layout of double positioning plates and double guide plates, the motion stability and structural strength of the positioning linkage mechanism are improved. The two sets of plates are set in parallel and spaced apart, forming a stable frame-type transmission structure, which disperses the lateral force and torque generated during the movement of the moving contact assembly, prevents the mechanism from jamming or deviating, ensures that the force is evenly transmitted inside the mechanism, and keeps the moving contact assembly in a straight line motion trajectory, improving the accuracy and consistency of the on and off operation. At the same time, the double plate structure provides redundant mechanical support. Even if one side of the plate malfunctions, the other side can still maintain the basic function of the mechanism, enhancing the reliability and service life of the device.

[0019] Furthermore, through the coordinated operation of the moving connecting rod contact, the insulated push-pull rod, the threaded lead wire, and the lead wire on the moving contact side, the on / off operation and current conduction are optimized and integrated. The insulated push-pull rod accurately transmits the external operating force to the moving connecting rod contact, driving it to reliably switch on and off with the stationary contact. The flexible conductive structure of the threaded lead wire maintains a good electrical connection during the reciprocating motion of the moving contact, avoiding the fatigue fracture problem that is prone to occur in traditional rigid connections. Thus, it ensures both the mechanical reliability of the on / off operation and the stability of the current path. At the same time, the internal structure of the insulating shell is optimized through a reasonable spatial layout, enabling the device to achieve efficient and reliable electrical isolation and mechanical transmission within a limited space.

[0020] Furthermore, through the modular design of the insulating chamber, connecting pipe, guide tube, and insulating cover, a highly integrated and well-sealed insulating protection system is constructed. The insulating chamber provides a stable and reliable working space for the positioning linkage mechanism, ensuring that its movement is not disturbed by external factors. The connecting pipe and guide tube guide the precise alignment of the moving contact assembly and the stationary contact assembly, respectively, ensuring the accuracy of on / off contact. The insulating cover facilitates convenient disassembly and maintenance, and the sliding cooperation between the insulating cover and the positioning linkage mechanism further enhances the guiding accuracy of the moving parts. Thus, the independence of each functional area is guaranteed, and the overall structural integrity is achieved through precise docking design, enabling the device to maintain long-term insulation performance and mechanical stability even in complex outdoor environments.

[0021] Furthermore, the triangular insulating chamber and insulating cover achieve efficient utilization of internal space and optimized structural layout. The triangular design provides greater room for movement and a more reasonable lever arm arrangement for the positioning linkage mechanism, making the mechanism move more smoothly and naturally. The second and third guide grooves set on the inner side of the insulating chamber and insulating cover together form a precise guide track, ensuring that the positioning linkage mechanism maintains a stable movement trajectory during movement and preventing the mechanism from deviating or jamming. Thus, not only is the mechanical reliability of the device improved, but the compact triangular layout also optimizes the internal space allocation, enabling the entire device to achieve miniaturization and weight reduction while ensuring insulation performance.

[0022] Furthermore, the static contact and its side lead wire achieve simplicity and reliability in electrical connection. The static contact is directly mounted on the insulating shell to form a stable support structure, effectively ensuring mechanical strength when in contact with the moving contact. The static contact side lead wire forms a smooth current path through direct connection, avoiding contact resistance and heat generation problems that may be caused by intermediate transfer links. As a result, not only is the contact resistance reduced and conductivity improved, but the reliability of the device is also enhanced by reducing the number of connecting parts. At the same time, it creates favorable conditions for the overall sealing design of the insulating shell, ensuring that the device maintains stable electrical performance during long-term operation.

[0023] Furthermore, a stable yet flexible three-point support system is constructed through the coordinated arrangement of the first insulating support column, the second insulating support column, and the support frame. The spaced arrangement of the double insulating support columns not only provides balanced and reliable support for the insulating shell, but also increases the creepage distance through reasonable spacing design, thereby improving the insulation safety of the device. The stable connection between the support frame and the insulating support column ensures the structural stability of the entire device when installed on the column, and can effectively resist the influence of external forces such as wind vibration. Thus, the mechanical strength of the device during operation is guaranteed, and the reasonable layout of the insulating support columns provides sufficient insulation protection for live parts, enabling the device to maintain a stable working state for a long time in complex outdoor environments.

[0024] The working method of the voltage transformer on / off control device of the present invention solves the technical problems in the prior art, such as the easy occurrence of circuit faults caused by exposed live parts and small animals touching the circuit, low fault isolation efficiency when power is not interrupted, high risk of live work, and inconvenience of operation. It achieves the following beneficial effects: the optimized operation process realizes the high efficiency and safety of voltage transformer on / off control. During operation, the moving contact assembly drives the positioning linkage mechanism to move. When the mechanism crosses the critical position, it generates an acceleration effect, so that the contact obtains ideal motion characteristics at the moment of connection or disconnection, effectively suppressing the generation and ablation of electric arc. This not only ensures the rapid completion of the on / off operation, but also realizes the precise maintenance of the operating position through the automatic reset function of the positioning linkage mechanism, preventing changes in the contact state caused by vibration and other factors. The whole operation process is simple and reliable, and stable and reliable circuit on / off control can be achieved without complicated operation procedures, improving the convenience and safety of equipment operation. At the same time, the optimized motion control extends the service life of the device. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0026] Figure 1 This is a partial structural schematic diagram of a voltage transformer switching control device provided according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the reinforcing metal frame and the reinforcing metal frame cover of the voltage transformer switching control device provided in the embodiment of the present invention. Figure 3 This is a partial structural schematic diagram of a voltage transformer switching control device provided according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the moving link contact of the voltage transformer on / off control device provided in an embodiment of the present invention; Figure 5 This is a side view of the support frame of the voltage transformer switching control device provided according to an embodiment of the present invention; Figure 6 This is a top view of the support frame of the voltage transformer switching control device provided according to an embodiment of the present invention; The components include: 1. Support frame; 2. First insulating support column; 3. Connecting plate; 4. Semi-circular clamp; 5. Insulating shell; 6. Clamp; 7. First pin; 8. Spring clip; 9. Stationary contact; 10. Stationary contact fastening nut; 11. External threaded screw terminal; 12. Moving contact side lead wire; 13. Moving connecting rod contact; 14. Anti-wear sleeve; 15. Guide connecting plate; 16. Positioning connecting plate; 17. Spring; 18. Reinforcing metal frame; 19. Second insulating support column; 20. First guide groove; 21. Guide pin; 22. Fixing rod; 23. Limiting round tube; 24. Insulating push-pull rod; 25. Pull ring; 26. Spiral lead wire; 27. Stationary contact side lead wire; 28. First terminal block; 29. ​​First bolt; 30. Second pin; 31. Set screw; 32. Reinforcing metal frame cover; 33. Embedded bolt. Detailed Implementation

[0027] 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. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the 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 present invention without inventive effort are within the scope of protection of the present invention.

[0028] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0029] The following is for reference Figures 1-6 The present invention provides a detailed description of a voltage transformer switching control device and its operating method, which are described in the embodiments of the present invention.

[0030] The first aspect of the present invention provides a voltage transformer switching control device, which will be described in detail below with reference to the accompanying drawings.

[0031] like Figures 1-6As shown, a voltage transformer switching control device includes an insulating shell 5, a stationary contact assembly, a moving contact assembly, and a positioning linkage mechanism. One end of the stationary contact assembly passes through one end of the insulating shell 5, and the other end of the stationary contact assembly is used for electrical connection to a pole-mounted circuit breaker. One end of the moving contact assembly is movably disposed within the insulating shell 5, and one end of the moving contact assembly is slew-connected to one end of the stationary contact assembly. The other end of the moving contact assembly passes through the other end of the insulating shell 5, and the other end of the moving contact assembly is used for electrical connection to an electronic transformer and connection to external insulating operating equipment. The positioning linkage mechanism is movably disposed within the insulating shell 5, and the positioning linkage mechanism is connected to the moving contact assembly to drive the moving contact assembly to switch on / off with the stationary contact assembly and to position it.

[0032] It should be noted that the insulating shell 5 is made of insulating material.

[0033] Therefore, the voltage transformer on / off control device of the present invention solves the technical problems in the prior art, such as the ease with which exposed live parts and small animals can cause circuit faults, low fault isolation efficiency when power is not interrupted, high risk of live work, and inconvenient operation. It achieves the following beneficial effects: by using a fully insulated shell to completely seal the stationary contact assembly, moving contact assembly, and positioning linkage mechanism, it eliminates the risk of electric shock and animal-induced short circuits caused by exposed live parts in traditional drop-out fuses, improving the safety and reliability of equipment operation. Simultaneously, the built-in positioning linkage mechanism ensures that the moving contact is in contact with the stationary contact... When the first 9 is connected or disconnected, it accurately and quickly reaches the predetermined position and locks stably, avoiding poor contact or accidental disconnection caused by vibration or misoperation. This ensures the accuracy and consistency of the on / off operation, allowing maintenance personnel to safely and conveniently complete the switching and fault isolation operations of the voltage transformer from the ground using only insulated operating equipment without having to climb the pole. This reduces the fault handling time that originally required several minutes to seconds, improving the operation and maintenance efficiency and power supply reliability of the distribution line. It provides a safer, more efficient and reliable voltage transformer control solution for the construction of distribution network automation.

[0034] like Figures 1-3As shown, in one embodiment, the positioning linkage mechanism includes a reinforcing metal frame 18, a positioning connecting plate 16, a guide connecting plate 15, and a spring 17. The reinforcing metal frame 18 is fixedly connected to the insulating shell 5. One end of the positioning connecting plate 16 is rotatably connected to one end of the reinforcing metal frame 18 and one end of the spring 17. The other end of the positioning connecting plate 16 is rotatably connected to the middle of the guide connecting plate 15. One end of the guide connecting plate 15 is rotatably connected to the moving contact assembly. The other end of the guide connecting plate 15 is movably disposed on the other end of the reinforcing metal frame 18. The other end of the guide connecting plate 15 is rotatably connected to the other end of the reinforcing metal frame 18 and the other end of the spring 17.

[0035] It should be noted that the reinforcing metal frame 18 is fixed to the insulating shell 5 by screws.

[0036] Thus, through the coordinated operation of the reinforcing metal frame 18, the positioning connecting plate 16, the guide connecting plate 15, and the spring 17, precise guidance and reliable positioning of the moving contact assembly during its movement are achieved. When the moving contact assembly is in motion, the guide connecting plate 15 slides along the reinforcing metal frame 18, and through the lever action of the positioning connecting plate 16, a stable over-dead-point mechanism is formed with the cooperation of the spring 17. This allows the moving contact to obtain a rapid movement speed at the moment of connection or separation from the stationary contact 9, reducing arc erosion. At the same time, it ensures stable self-locking at both the connection and separation positions, preventing malfunctions caused by vibration or external forces. This results in smooth operation of the device, low operating force, long mechanical life, and improved reliability and accuracy of on / off control.

[0037] In one embodiment, one end of the reinforcing metal frame 18 is located on one side of the moving contact assembly. A fixing rod 22 passes through one end of the reinforcing metal frame 18. One end of the fixing rod 22 is connected to one side of the insulating shell 5, and the other end of the fixing rod 22 is connected to the other side of the insulating shell 5. One end of the positioning connecting plate 16 and one end of the spring 17 are sleeved on the fixing rod 22. The other end of the reinforcing metal frame 18 is located on the other side of the moving contact assembly. A first guide groove 20 is provided on the other end of the reinforcing metal frame 18. A movable guide pin 21 passes through the first guide groove 20. One end of the guide pin 21 is slidably connected to one side of the insulating shell 5, and the other end of the guide pin 21 is slidably connected to the other side of the insulating shell 5. The other end of the guide connecting plate 15 and the other end of the spring 17 are sleeved on the guide pin 21.

[0038] It should be noted that the spring 17 is a tension spring, which forms a contraction load between the fixed rod 22 and the guide pin 21 to achieve the positioning function; in this embodiment, preferably, the extension direction of the reinforcing metal frame 18 and the extension direction of the first guide groove 20 are both perpendicular to the moving direction of the moving contact assembly, and the guide pin 21 can move along the extension direction of the first guide groove 20; in this embodiment, preferably, when there are multiple positioning connecting plates 16, in order to prevent each positioning connecting plate from bending inward, each positioning connecting plate 16 is provided with a limiting round tube 23, and the limiting round tube 23 is sleeved on the fixed rod 22. Thus, the unique arrangement of the fixed rod 22 and the guide pin 21 achieves structural stability and precise movement. The fixed rod 22 serves as the fixed fulcrum for the positioning plate 16 and the spring 17, ensuring reliable force transmission. The sliding engagement of the guide pin 21 with the first guide groove 20 provides a precise movement trajectory for the guide plate 15, making the movement of the moving contact assembly more stable and controllable. The guide pin 21 and the fixed rod 22 enable the force of the spring 17 to form an effective torque balance through the guide pin 21 and the fixed rod 22, generating obvious force feedback when passing through the critical position, helping the operator perceive the operating position, and ensuring that the contact obtains the best motion characteristics at the moment of connection and separation, thereby improving the mechanical life and operational reliability of the device.

[0039] In one embodiment, a reinforcing metal frame cover 32 is provided on one side of the insulating shell 5. The reinforcing metal frame cover 32 is fastened to the reinforcing metal frame 18, and the reinforcing metal frame cover 32 is provided with the third guide groove.

[0040] In one embodiment, a reinforcing metal frame 18 groove is provided on the other side of the insulating shell 5, and the reinforcing metal frame 18 passes through the groove. This restricts the movement of the reinforcing metal frame 18.

[0041] In one embodiment, a first pin 7 is provided on the other end of the positioning plate 16 and the middle part of the guide plate 15, and a second pin 30 is provided on one end of the guide plate 15 and the moving contact assembly.

[0042] It should be noted that, in order to maintain the stability of the device, in this embodiment, the first pin 7, the second pin 30, and the guide pin 21 are all slotted pins, and spring clips 8 are fitted on both ends of the first pin 7, the second pin 30, and the guide pin 21; when there are multiple guide connecting plates 15, in order to prevent each guide connecting plate 15 from bending inward, in this embodiment, preferably, the middle diameter of the second pin 30, the first pin 7, and the guide pin 21 is larger than the diameter of the pin mounting hole of each guide connecting plate 15.

[0043] In one embodiment, the number of positioning connecting plates 16 and the number of guide connecting plates 15 are both two. The positioning connecting plates 16 are arranged in parallel and spaced apart, and the guide connecting plates 15 are arranged in parallel and spaced apart.

[0044] Therefore, by adopting a symmetrical layout of double positioning connecting plates 16 and double guide connecting plates 15, the motion stability and structural strength of the positioning linkage mechanism are improved. The two sets of connecting plates are set in parallel and spaced apart, forming a stable frame-type transmission structure, which disperses the lateral force and torque generated during the movement of the moving contact assembly, prevents the mechanism from jamming or deflecting, ensures that the force is uniformly transmitted inside the mechanism, and makes the moving contact assembly always maintain a straight motion trajectory, improving the accuracy and consistency of the on and off operation. At the same time, the double connecting plate structure provides redundant mechanical support. Even if one side of the connecting plate is abnormal, the other side can still maintain the basic function of the mechanism, enhancing the reliability and service life of the device.

[0045] like Figure 4 As shown, in one embodiment, the moving contact assembly includes a moving connecting rod contact 13, an insulating push-pull rod 24, a threaded lead wire, and a moving contact side lead wire 12. The moving connecting rod contact 13 is movably disposed within the insulating shell 5. One end of the moving connecting rod contact 13 is connected to one end of the stationary contact assembly in a switchable manner. The other end of the moving connecting rod contact 13 is drively connected to one end of the insulating push-pull rod 24. Both the other end of the moving connecting rod contact 13 and the other end of the insulating push-pull rod 24 are rotatably connected to the positioning linkage mechanism. The other end of the insulating push-pull rod 24 is movably inserted through the other end of the insulating shell 5. One end of the threaded lead wire is electrically connected to the other end of the moving connecting rod contact 13. One end of the moving contact side lead wire 12 is electrically connected to the other end of the threaded lead wire. The other end of the moving contact side lead wire 12 is inserted through the insulating shell 5.

[0046] It should be noted that, in this embodiment, preferably, the moving connecting rod contact 13 is made of a metal rod, the insulated push-pull rod 24 is made of an insulated rod, the spiral lead 26 is made of multiple strands of metal material to serve as a current carrier, and the moving contact side lead 12 is made of medium-voltage insulated wire; in this embodiment, preferably, the moving connecting rod contact 13, the insulated push-pull rod 24, and one end of the stationary contact assembly are coaxially arranged; in order to connect the spiral lead 26 and the moving contact side lead 12, a terminal block can be provided in the insulating shell 5 at a position that does not affect the movement of the positioning linkage mechanism, the spiral lead 26 is S-shaped and reserved to the length of the moving connecting rod contact 13 for reciprocating movement; in this embodiment, preferably, a first terminal block 28 is provided on both ends of the moving contact side lead 12, and the first terminal block 28 located on the other end of the moving contact side lead 12 is used for electrical connection to the electronic transformer; For ease of operation with insulation, in this embodiment, preferably, a pull ring 25 is provided on the other end of the insulating push-pull rod 24; in this embodiment, preferably, one end of the moving connecting rod contact 13 is cylindrical and has a chamfer; to prevent wear and protect the moving connecting rod contact 13, in this embodiment, an anti-wear sleeve 14 is provided on the moving contact; in this embodiment, preferably, the other end of the moving connecting rod contact 13 has a first opening and a second opening, a second pin 30 is passed through the insulating push-pull rod 24, the second pin 30 is passed through the first opening, a spring clip 8 is sleeved on the second pin 30, and a set screw 31 is provided on the insulating push-pull rod 24, the set screw 31 is passed through the second opening; in this embodiment, preferably, the moving connecting rod contact 13 has a wiring hole, and the spiral lead wire 26 is passed through the wiring hole.

[0047] Thus, through the coordinated operation of the moving connecting rod contact 13, the insulating push-pull rod 24, the threaded lead wire, and the moving contact side lead wire 12, the optimized integration of switching operation and current conduction is achieved. The insulating push-pull rod 24 accurately transmits the external operating force to the moving connecting rod contact 13, driving it to reliably switch with the stationary contact 9. Through the flexible conductive structure of the threaded lead wire, a good electrical connection is maintained throughout the reciprocating motion of the moving contact, avoiding the fatigue fracture problem that is prone to occur in traditional rigid connections. Thus, the mechanical reliability of the switching operation is ensured, and the stability of the current path is guaranteed. At the same time, the internal structure of the insulating shell 5 is optimized through a reasonable spatial layout, enabling the device to achieve efficient and reliable electrical isolation and mechanical transmission within a limited space.

[0048] like Figures 1-3As shown, in one embodiment, the insulating shell 5 includes an insulating chamber, a connecting pipe, a guide pipe, and an insulating cover. The insulating chamber is provided with the positioning linkage mechanism. One end of the insulating chamber is connected to one end of the connecting pipe. One end of the movable contact assembly is located in one end of the connecting pipe and one end of the insulating chamber. One end of the stationary contact assembly is located in the other end of the connecting pipe. The other end of the insulating chamber is connected to the guide pipe. The other end of the movable contact assembly passes through both the guide pipe and the other end of the insulating chamber. The insulating cover is sealed on the insulating chamber and is slidably connected to the positioning linkage mechanism.

[0049] Therefore, through the modular design of the insulating chamber, connecting pipe, guide pipe, and insulating cover, a highly integrated and well-sealed insulating protection system is constructed. The insulating chamber provides a stable and reliable working space for the positioning linkage mechanism, ensuring that its movement is not disturbed by external factors. The connecting pipe and guide pipe guide the precise alignment of the moving contact assembly and the stationary contact assembly, respectively, ensuring the accuracy of on / off contact. The insulating cover facilitates easy disassembly and maintenance, and the sliding cooperation between the insulating cover and the positioning linkage mechanism further enhances the guiding accuracy of the moving parts. Thus, the independence of each functional area is guaranteed, and the overall structural integrity is achieved through precise docking design, enabling the device to maintain long-term insulation performance and mechanical stability in complex outdoor environments.

[0050] In one embodiment, both the insulating chamber and the insulating cover are triangular. The first end of the insulating chamber is connected to one end of the connecting pipe, and the second end of the insulating chamber is connected to the guide pipe. The other end of the moving contact assembly passes through the second and third ends of the insulating chamber. A second guide groove is provided on the inner side of the insulating chamber, and a third guide groove is provided on the inner side of the insulating cover. The movable positioning linkage mechanism passes through both the second and third guide grooves.

[0051] It should be noted that the insulating chamber and the insulating cover are sealed together by screws; the guide tube has a circular through hole for installing the other end of the moving contact assembly, and the other end of the connecting tube has a polygonal through hole for installing one end of the stationary contact assembly.

[0052] Thus, the triangular insulating chamber and insulating cover achieve efficient utilization of internal space and optimized structural layout. The triangular design provides greater room for movement and a more reasonable lever arm arrangement for the positioning linkage mechanism, making the mechanism move more smoothly and naturally. The second and third guide grooves set on the inner side of the insulating chamber and insulating cover together form a precise guide track, ensuring that the positioning linkage mechanism maintains a stable movement trajectory during movement and preventing the mechanism from deviating or jamming. This not only improves the mechanical reliability of the device, but also optimizes the internal space allocation through the compact triangular layout, enabling the entire device to achieve miniaturization and weight reduction while ensuring insulation performance.

[0053] In one embodiment, the stationary contact assembly includes a stationary contact 9 and a stationary contact side lead-out line 27. One end of the stationary contact 9 is disposed inside one end of the insulating shell 5, and the other end of the stationary contact 9 passes through the insulating shell 5. The other end of the stationary contact 9 is connected to the stationary contact side lead-out line 27.

[0054] It should be noted that the stationary contact 9 is made of metal, and the lead wire 27 on the side of the stationary contact is waterproofed by applying adhesive. In this embodiment, preferably, the lead wire 27 on the side of the stationary contact is made of medium-voltage insulated wire. In this embodiment, preferably, a stationary contact fastening nut 10 is fitted on the middle part of the stationary contact 9, and the stationary contact fastening nut 10 is sealed to the insulating shell 5. One end of the stationary contact 9 is provided with a cylindrical groove for installing one end of the moving contact assembly, and the inner diameter of the cylindrical groove is... The outer diameter of one end of the moving contact assembly is compatible; in this embodiment, preferably, one end of the stationary contact side lead-out line 27 is provided with an external thread screw terminal 11, one end of the stationary contact side lead-out line 27 is provided with a second terminal, and the other end of the stationary contact 9 is provided with an internal thread round hole for installing the external thread screw terminal 11. The screw part of the external thread screw segment is provided with an anti-loosening nut. When the external thread screw terminal 11 is screwed into the internal thread round hole, the external thread screw terminal 11 is firmly fixed by tightening the anti-loosening nut.

[0055] Thus, the simplicity and reliability of the electrical connection are achieved through the stationary contact 9 and the stationary contact side lead 27. The stationary contact 9 is directly mounted on the insulating shell 5 to form a stable support structure, which effectively ensures the mechanical strength when in contact with the moving contact. The stationary contact side lead 27 forms a smooth current path through direct connection, avoiding contact resistance and heat generation problems that may be caused by intermediate transfer links. This not only reduces contact resistance and improves conductivity, but also enhances the reliability of the device by reducing the number of connecting parts. At the same time, it creates favorable conditions for the overall sealing design of the insulating shell 5, ensuring that the device maintains stable electrical performance during long-term operation.

[0056] like Figures 1-6 As shown, in one embodiment, it further includes a first insulating support 2, a second insulating support 19, and a support frame 1. The first insulating support 2 and the second insulating support 19 are spaced apart. One end of the first insulating support 2 is connected to one end of the insulating shell 5, and one end of the second insulating support 19 is connected to the other end of the insulating shell 5. The other ends of the first insulating support 2 and the second insulating support 19 are both connected to the support frame 1.

[0057] It should be noted that the support frame 1 can be installed on the crossbeam of the pole-mounted circuit breaker bracket or fixed on the fixing hole of the pole-mounted circuit breaker base. In order to adapt to three-phase circuits and improve installation efficiency, in this embodiment, preferably, the support frame 1 is provided with three mounting positions, and each mounting position is provided with the first insulating support 2 and the second insulating support 19.

[0058] Thus, a stable and flexible three-point support system is constructed through the coordinated arrangement of the first insulating support 2, the second insulating support 19, and the support frame 1. The spaced arrangement of the double insulating supports not only provides balanced and reliable support for the insulating shell 5, but also increases the creepage distance through reasonable spacing design, thereby improving the insulation safety of the device. The stable connection between the support frame 1 and the insulating support ensures the structural stability of the entire device when it is installed on the column, and can effectively resist the influence of external forces such as wind vibration. Thus, the mechanical strength of the device during operation is guaranteed, and the reasonable layout of the insulating supports provides sufficient insulation protection for the live parts, enabling the device to maintain a stable working state for a long time in complex outdoor environments.

[0059] like Figures 5-6 As shown, in one embodiment, the support frame 1 includes a first support rod, a second support rod, a first crossbeam, and a second crossbeam. The first support rod and the second support rod are spaced apart and arranged in parallel. The first crossbeam and the second crossbeam are spaced apart and arranged in parallel. One end of the first crossbeam and one end of the second crossbeam are both connected to one end of the first support rod. The other end of the first crossbeam and the other end of the second crossbeam are both connected to one end of the second support rod. The first crossbeam is provided with a first insulating support post 2, and the second crossbeam is provided with a second insulating support post 19.

[0060] It should be noted that the first support rod, the second support rod, the first crossbeam, and the second crossbeam are all made of angle steel. To prevent birds from nesting, in this embodiment, preferably, the slots of the first support rod, the second support rod, the first crossbeam, and the second crossbeam face downwards. The other end of the first support rod and the other end of the second support rod can be fixed to the crossbeam of the pole-mounted circuit breaker bracket with bolts, or they can be fixed to the fixing holes of the pole-mounted circuit breaker base. The extension direction of the first support rod and the second support rod is adapted to the column head direction of the pole-mounted circuit breaker.

[0061] In one embodiment, both the first support rod and the second support rod include a first rod body, a second rod body, and a third rod body connected sequentially. The first rod body and the third rod body are parallel and spaced apart. The angles between the first rod body and the second rod body, and between the second rod body and the third rod body, are both obtuse angles. The third rod body is connected to both the first crossbeam and the second crossbeam. This creates a bending angle, allowing a certain height for the insulating support column.

[0062] In one embodiment, both the first insulating support 2 and the second insulating support 19 include an insulating rod and an insulating sleeve. The insulating sleeve is fitted onto the insulating rod. One end of the insulating rod is provided with a first concave arc groove. A first bolt 29 and a second bolt are respectively threaded through the opposite side walls of the first concave arc groove. A semi-circular clamp 4 is fitted onto the first bolt 29 and the second bolt, so that a first mounting position is formed between the first concave arc groove and the semi-circular clamp 4. The first mounting position on the first insulating support 2 is used to install one end of the insulating shell 5, and the first mounting position on the second insulating support 19 is used to install the other end of the insulating shell 5. The other end of the insulating rod is provided with a pre-embedded bolt 33, which is threadedly connected to the support frame 1.

[0063] It should be noted that, in order to improve the fastening force, in this embodiment, preferably, the pre-embedded bolt 33, the first bolt 29 and the second bolt are all fitted with flat washers, spring washers 17 and nuts, and the inner arc side of the semi-circular clamp 4 is provided with a soft pad layer; in order to prevent rain, in this embodiment, the insulating sleeve is provided with multiple rain skirts.

[0064] In one embodiment, a connecting plate 3 is further included. A second concave arc groove is provided on one end and the other end of the connecting plate 3. A third bolt and a fourth bolt are respectively provided on the opposite side walls of the second concave arc groove. A clamp 6 is fitted on the third bolt and the fourth bolt, so that a second mounting position is formed between the second concave arc groove and the clamp 6. The second mounting position located on one end of the connecting plate 3 is used to install the other end of the first insulating support 2, and the second mounting position located on the other end of the connecting plate 3 is used to install the other end of the second insulating support 19.

[0065] It should be noted that the connecting plate 3 is made of metal, the diameter of the second mounting position is adapted to the diameter of the first insulating post 2 and the second insulating post 19, and the length of the connecting plate 3 is determined by the distance between the first insulating post 2 and the second insulating post 19.

[0066] The second aspect of the present invention provides a method for operating a voltage transformer switching control device, which is described in detail below.

[0067] A method for operating a voltage transformer on / off control device, based on the voltage transformer on / off control device provided in any of the above embodiments, includes: In the initial state, the other end of the moving contact assembly is connected to the electronic transformer, and the other end of the stationary contact assembly is connected to the pole-mounted circuit breaker. The other end of the moving contact assembly is moved, and the other end of the moving contact assembly drives one end of the moving contact assembly and the positioning linkage mechanism to move. When the positioning linkage mechanism moves past the critical position, the positioning linkage mechanism drives the moving contact assembly to move faster, so that the moving contact assembly and the stationary contact assembly are connected or disconnected faster. When the moving contact assembly and the stationary contact assembly are connected or disconnected from the stationary contact assembly until the positioning linkage mechanism is reset, the positioning linkage mechanism drives the moving contact assembly to be positioned. The voltage transformer is energized when the moving contact assembly is connected to the stationary contact assembly, and de-energized when the moving contact assembly is disconnected from the stationary contact assembly.

[0068] Therefore, the working method of the voltage transformer on / off control device of the present invention solves the technical problems in the prior art, such as the easy occurrence of circuit faults caused by exposed live parts and small animals touching the circuit, low fault isolation efficiency when power is not interrupted, high risk of live work, and inconvenience of operation. It achieves beneficial effects: the optimized operation process realizes the high efficiency and safety of voltage transformer on / off control. During operation, the moving contact assembly drives the positioning linkage mechanism to move. When the mechanism crosses the critical position, it generates an acceleration effect, so that the contact obtains ideal motion characteristics at the moment of connection or disconnection, effectively suppressing the generation and ablation of electric arc. It not only ensures the rapid completion of the on / off operation, but also realizes the precise maintenance of the operating position through the automatic reset function of the positioning linkage mechanism, preventing changes in the contact state caused by vibration and other factors. The whole operation process is simple and reliable, and stable and reliable circuit on / off control can be achieved without complicated operation procedures, improving the convenience and safety of equipment operation. At the same time, the optimized motion control extends the service life of the device.

[0069] like Figures 1-6 As shown, an optional working process of the voltage transformer on / off control device and its working method in this invention is as follows: In the initial state, the other end of the moving contact side lead 12 is connected to the electronic transformer, and the other end of the stationary contact side lead 27 is connected to the pole-mounted circuit breaker. Under the tension of the spring 17, the guide pin 21 is located at the end of the first guide groove 20 near the moving connecting rod contact 13. The other ends of each positioning connecting plate 16, each guide connecting plate 15, the moving connecting rod contact 13, and the insulating push-pull rod 24 are located on the side of the spring 17 away from the stationary contact 9. One end of the moving connecting rod contact 13 is located at one end of the connecting pipe, and the stationary contact 9 is located at the other end of the connecting pipe. The moving connecting rod contact 13 is disconnected from the stationary contact 9, the voltage transformer and the pole-mounted circuit breaker are in an open state, and the voltage transformer is de-energized. When closing the circuit is required: Pushing the pull ring 25 causes it to move closer to the stationary contact 9, which in turn moves the insulating push-pull rod 24 closer to the stationary contact 9, thereby causing one end of the guide plate 15, the other end of the positioning plate 16, and the moving connecting rod contact 13 to move closer to the stationary contact 9. This causes one end of the guide plate 15 and the other end of the positioning plate 16 to rotate closer to the spring 17, and the spring 17 is stretched. When one end of the guide plate 15 and the other end of the positioning plate 16 cross the critical position, the guide plate 15 and the positioning plate 16 rotate to the side of the spring 17 near the stationary contact 9. The spring 17 completes its maximum extension distance, retracts, and pulls the other end of the guide plate 15, thereby pushing the guide plate 15 and the positioning plate 16 to accelerate their rotation towards the stationary contact 9. The guide plate 15 drives the moving rod contact 13 to accelerate its movement towards the stationary contact 9, so that the moving rod contact 13 and the stationary contact 9 are connected at an accelerated speed. When the moving rod contact 13 moves to connect with the stationary contact 9, the guide plate 15 drives the moving rod contact 13 to be positioned, and the voltage transformer and the pole-mounted circuit breaker are in the connected state, and the voltage transformer is energized. When tripping is required: Pulling the pull ring 25 moves it away from the stationary contact 9, causing the insulating push-pull rod 24 to move away from the stationary contact 9, which in turn causes one end of the guide plate 15, the other end of the positioning plate 16, and the moving connecting rod contact 13 to move away from the stationary contact 9. This causes one end of the guide plate 15 and the other end of the positioning plate 16 to rotate towards the spring 17, and the spring 17 is stretched. When one end of the guide plate 15 and the other end of the positioning plate 16 cross the critical position, the guide plate 15 and the positioning plate 16 rotate to the side of the spring 17 away from the stationary contact 9. The spring 17 completes its maximum extension distance, retracts, and pulls the other end of the guide plate 15, thereby pushing the guide plate 15 and the positioning plate 16 to accelerate their rotation away from the stationary contact 9. The guide plate 15 drives the moving rod contact 13 to accelerate its movement away from the stationary contact 9, causing the moving rod contact 13 to break away from the stationary contact 9 at an accelerated rate. When the spring 17 retracts and drives the other end of the guide plate 15 to reset, the guide plate 15 drives the moving rod contact 13 to be positioned, the voltage transformer and the pole-mounted circuit breaker are in an open state, and the voltage transformer is de-energized.

[0070] Furthermore, the terms "first" and "another" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" or "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] In the description of this specification, references to terms such as "an embodiment," "an example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A voltage transformer on-off control device, characterized by, The utility model relates to a kind of bushing, including: Insulating shell; Static contact assembly, one end of the static contact assembly is arranged in one end of the insulating shell, and the other end of the static contact assembly is used to electrically connect pole circuit breaker; Moving contact assembly, one end of the moving contact assembly is movably arranged in the insulating shell, one end of the moving contact assembly is connected with one end of the static contact assembly, the other end of the moving contact assembly is arranged in the other end of the insulating shell, and the other end of the moving contact assembly is used to electrically connect electronic transformer and connect external insulation operating equipment; Positioning link mechanism, the positioning link mechanism is movably arranged in the insulating shell, and the positioning link mechanism is connected with the moving contact assembly to drive the moving contact assembly and the static contact assembly to be connected and positioned.

2. The voltage transformer on-off control device according to claim 1, characterized in that, The positioning link mechanism includes reinforcing metal frame, positioning link plate, guide link plate and spring, the reinforcing metal frame is fixedly connected with the insulating shell, one end of the positioning link plate is rotatably connected with one end of the reinforcing metal frame and one end of the spring, the other end of the positioning link plate is rotatably connected with the middle part of the guide link plate, one end of the guide link plate is rotatably connected with the moving contact assembly, the other end of the guide link plate is movably arranged on the other end of the reinforcing metal frame, and the other end of the guide link plate is rotatably connected with the other end of the reinforcing metal frame and the other end of the spring.

3. The voltage transformer on-off control device of claim 2, wherein, One end of the reinforcing metal frame is arranged on one side of the moving contact assembly, a fixing rod is arranged on one end of the reinforcing metal frame, one end of the fixing rod is connected with one side of the insulating shell, the other end of the fixing rod is connected with the other side of the insulating shell, one end of the positioning link plate and one end of the spring are sleeved on the fixing rod, the other end of the reinforcing metal frame is arranged on the other side of the moving contact assembly, a first guide groove is arranged on the other end of the reinforcing metal frame, a movable guide pin is arranged in the first guide groove, one end of the guide pin is slidably connected with one side of the insulating shell, the other end of the guide pin is slidably connected with the other side of the insulating shell, and the other end of the guide link plate and the other end of the spring are sleeved on the guide pin.

4. The voltage transformer on-off control device of claim 2, wherein, The number of the positioning link plates and the number of the guide link plates are both 2, and each of the positioning link plates is arranged in parallel and spaced apart, and each of the guide link plates is arranged in parallel and spaced apart.

5. The voltage transformer on-off control device of claim 1, wherein, The moving contact assembly comprises a moving link contact, an insulating push-pull rod, a threaded lead wire and a moving contact side lead-out wire, the moving link contact is movably arranged in the insulating shell, one end of the moving link contact is in breakable connection with one end of the static contact assembly, the other end of the moving link contact is in transmission connection with one end of the insulating push-pull rod, the other end of the moving link contact and one end of the insulating push-pull rod are in rotation connection with the positioning link mechanism, the other end of the insulating push-pull rod is movably arranged on the other end of the insulating shell, one end of the threaded lead wire is in electrical connection with the other end of the moving link contact, one end of the moving contact side lead-out wire is in electrical connection with the other end of the threaded lead wire, the other end of the moving contact side lead-out wire is arranged on the insulating shell.

6. The voltage transformer on-off control device of claim 1, wherein, The insulating shell comprises an insulating bin body, a butt joint pipe, a guide pipe and an insulating cover, the positioning link mechanism is arranged in the insulating bin body, one end of the insulating bin body is in communication with one end of the butt joint pipe, one end of the butt joint pipe and one end of the insulating bin body are arranged with one end of the movable moving contact assembly, the other end of the butt joint pipe is arranged with one end of the static contact assembly, the other end of the insulating bin body is in communication with the guide pipe, the other end of the guide pipe and the other end of the insulating bin body are arranged with the other end of the moving contact assembly, the insulating cover is arranged on the insulating bin body, and the insulating cover is in sliding connection with the positioning link mechanism.

7. The voltage transformer on-off control device of claim 6, wherein, The insulating bin body and the insulating cover are both triangular, one end of the insulating bin body is in communication with one end of the butt joint pipe, the other end of the insulating bin body is in communication with the guide pipe, the other end of the insulating bin body and the third end of the insulating bin body are arranged with the other end of the moving contact assembly, the inner side of the insulating bin body is arranged with a second guide groove, the inner side of the insulating cover is arranged with a third guide groove, and the second guide groove and the third guide groove are arranged with the movable positioning link mechanism.

8. The voltage transformer on-off control device of claim 1, wherein, The static contact assembly comprises a static contact and a static contact side lead-out wire, one end of the static contact is arranged in one end of the insulating shell, the other end of the static contact is arranged on the insulating shell, and the other end of the static contact is connected with the static contact side lead-out wire.

9. The voltage transformer on-off control device of claim 1, wherein, Further comprising a first insulating support, a second insulating support and a support frame, the first insulating support and the second insulating support are arranged with a space therebetween, one end of the first insulating support is connected with one end of the insulating shell, one end of the second insulating support is connected with the other end of the insulating shell, and the other end of the first insulating support and the other end of the second insulating support are both connected with the support frame.

10. A method of operating a voltage transformer on-off control device, characterized by, The voltage transformer on-off control device according to any one of claims 1-9, comprising: In the initial state, the other end of the moving contact assembly is connected with the electronic transformer, and the other end of the static contact assembly is connected with the pole-mounted circuit breaker; In the initial state, the other end of the moving contact assembly is connected with the electronic transformer, and the other end of the static contact assembly is connected with the pole-mounted circuit breaker; moving another end of the moving contact assembly, which moves one end of the moving contact assembly and the positioning link mechanism, when the positioning link mechanism moves beyond a critical position, the positioning link mechanism causes the moving contact assembly to accelerate movement, so that the moving contact assembly and the stationary contact assembly accelerate to connect or accelerate to disconnect, when the moving contact assembly and the stationary contact assembly connect or the moving contact assembly and the stationary contact assembly disconnect to the reset of the positioning link mechanism, the positioning link mechanism causes the moving contact assembly to be positioned; wherein the voltage transformer is powered when the moving contact assembly and the stationary contact assembly connect, and the voltage transformer is powered off when the moving contact assembly and the stationary contact assembly disconnect.

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