Automatic voltage regulating device for transformer

Abstract

The invention provides an automatic voltage regulating device for a transformer. The automatic voltage regulating device comprises a support, an excitation switch, an excitation switch fixing mechanism, a rotating regulating shaft, a motor, a rotating assembly, a voltage regulating gear piece, a magnetic induction assembly and a control box. Wherein the support is arranged on the transformer, an excitation switch fixing mechanism and an excitation switch are arranged on the lower portion in the support, a rotary adjusting shaft is arranged in the excitation switch in a sleeved mode, the upper end of the rotary adjusting shaft is connected with the voltage adjusting gear piece, and the lower end of the rotary adjusting shaft is connected with the excitation switch, so that after the rotary assembly and the voltage adjusting gear piece are pushed by external force to rotate, the excitation switch is driven to rotate. The rotary adjusting shaft is driven to rotate, so that the gear of the excitation switch is adjusted, and the voltage adjustment of the transformer is completed; the motor is arranged on the support, a main shaft of the motor is connected with the rotating assembly, the rotating assembly is coaxially connected with the voltage regulating gear piece in a matched mode and used for pushing the voltage regulating gear piece to rotate, the magnetic induction assembly is arranged on the support, the magnetic induction assembly is connected with the rotating assembly in a matched mode, and the magnetic induction assembly is used for pushing the voltage regulating gear piece to rotate. The control box is electrically connected with the motor and the magnetic induction assembly.

Description

Technical Field

[0001] The present invention relates to a voltage regulating device, in particular to an automatic voltage regulating device for a transformer, and belongs to the technical field of design and manufacture of electric machinery. Background Art

[0002] The primary side of the transformer is connected to the power supply line of the power grid. Since the power grid voltage may fluctuate due to various reasons, the secondary voltage of the transformer will also fluctuate accordingly. In addition, the electrical equipment connected to the secondary side of the transformer will also affect the change of the secondary voltage of the transformer due to different load sizes and load power factors, thereby affecting the normal operation of the electrical equipment. In order to solve the above problems, the transformer needs to have a certain voltage regulation capability to meet the operating needs of the power grid and electrical equipment.

[0003] Voltage regulation of a transformer refers to adjusting the output voltage by changing the turns ratio between the primary and secondary coils of the transformer. Voltage regulation is an important function of the transformer, which is used to ensure the stability of the output voltage and meet the changing requirements of the load impedance. Specifically, when the input voltage changes, the current in the primary coil will also change, causing a change in the magnetic field strength. The change in magnetic field strength will cause the induced electromotive force in the secondary coil to change, causing a change in the output voltage. By changing the transformer ratio, that is, changing the turns ratio between the primary and secondary coils, the output voltage can be adjusted. In practical applications, voltage regulation can be divided into two methods: on-load voltage regulation and no-load voltage regulation. On-load voltage regulation refers to voltage regulation when the transformer is running under normal load, while no-load voltage regulation refers to voltage regulation when the transformer is in an unloaded state. On-load voltage regulation can be achieved by adjusting the transformer tap, while no-load voltage regulation can be achieved by changing the transformer ratio.

[0004] Commonly used no-load voltage regulation is divided into 3 or 5 gears. The voltage difference of each gear in the 3 gears is 5%, and the second gear is the rated operating position; the voltage difference of each gear in the 5 gears is 2.5%, and the third gear is the rated operating position. When the output voltage of the transformer is lower than the rated value, such as a 10kV transformer, it has three gears, gear I: 10.5kV, 400V; gear II: 10kV, 400V; gear III: 9.5kV, 400V. It can be seen that when the input voltage is constant, the output voltage of gear I is the lowest and the output voltage of gear III is the highest. Adjust the position of the tap changer from gear I to gear II, or from gear II to gear III, the output voltage increases, and vice versa. That is, "low to low, high to high". "Low to low" means that the number of turns of the primary winding decreases, the transformation ratio decreases, the power supply voltage remains unchanged, and the secondary voltage becomes higher. "High to high" means that the number of turns of the primary winding increases, the transformation ratio increases, the power supply voltage remains unchanged, and the secondary voltage becomes lower.

[0005] At present, no-load voltage regulation is mainly achieved by manually climbing onto the transformer, opening the transformer tap changer cover, and rotating the adjustment handle to the desired gear. The entire voltage regulation process requires climbing operations, and the cooperation of multiple people is required to complete the voltage regulation. This voltage regulation method is not only inefficient, time-consuming and labor-intensive, but also prone to falling accidents during climbing operations, which has a serious impact on the personal safety of the staff. In addition, the cooperation of multiple people requires frequent communication between members. If the communication is not smooth or misunderstandings occur, it may cause a waste of time and energy. Therefore, it is necessary to improve the existing technology. Summary of the invention

[0006] In order to solve the problems of low efficiency, difficulty in ensuring operational safety, need for close cooperation of operators, waste of human resources, etc. caused by manual climbing operation in the existing transformer voltage regulation, the present invention provides an automatic voltage regulating device for transformer.

[0007] The present invention is completed by the following technical scheme: an automatic voltage regulating device for a transformer, comprising a bracket, an excitation switch, an excitation switch fixing mechanism, a rotating adjustment shaft, a motor, a rotating component, a voltage regulating shift piece, a magnetic induction component, and a control box; wherein: The bracket is arranged on the transformer, and an excitation switch fixing mechanism and an excitation switch are arranged at the lower part of the bracket, and a rotating adjustment shaft is sleeved in the excitation switch, and the upper end of the rotating adjustment shaft is connected to the voltage regulating shift piece, and the lower end is connected to the excitation switch, so that after the rotating assembly and the voltage regulating shift piece rotate under the push of external force, the rotating adjustment shaft is driven to rotate, thereby adjusting the gear of the excitation switch to complete the voltage regulation of the transformer; The bracket is provided with the motor, the main shaft of the motor is connected to the rotating assembly, the rotating assembly is coaxially matched with the voltage regulating shift plate, and is used to drive the voltage regulating shift plate to rotate, the bracket is provided with the magnetic induction assembly, the magnetic induction assembly is matched with the rotating assembly, and the control box is electrically connected to the motor and the magnetic induction assembly; When the transformer voltage needs to be adjusted, the motor drives the rotating component and the voltage regulating shift piece to rotate, and then drives the rotating adjustment shaft to rotate, so that the rotating adjustment shaft drives the excitation switch to adjust the gear, thereby completing the voltage regulation of the transformer; and during the adjustment process, the control box can control the rotation angle of the rotating component through the magnetic induction component matched with the rotating component, thereby realizing precise voltage regulation of the transformer, ensuring that the transformer operates in the best working state, reducing the risk of voltage fluctuations, and improving the stability of the power system.

[0008] Furthermore, the bracket includes a motor protection shell, a control box is provided on the top of the motor protection shell, and a fixed disk is provided on the bottom of the motor protection shell. The fixed disk is connected to the excitation switch fixing mechanism below through multiple supporting columns around it. The motor is placed in the motor protection shell, and the motor main shaft passes downward through the fixed disk and is connected to the rotating assembly, so that the motor and the rotating assembly can be fixed above the excitation switch through the bracket, and the motor can drive the rotating assembly to promote the voltage regulating gear plate to rotate, and then drive the rotating adjustment shaft to rotate, so that the rotating adjustment shaft drives the excitation switch to adjust the gear, thereby completing the automatic voltage regulation of the transformer voltage.

[0009] Further, the excitation switch fixing mechanism comprises: a horizontal annular chuck composed of two identical left and right semi-circular bodies, the horizontal annular chuck is sleeved on the excitation switch through its center hole, the outer edge of the horizontal annular chuck is sleeved with a circular clamp, the annular clamp is composed of two identical left and right semi-circular bodies; a clamping groove matched with the outer edge of the horizontal annular chuck is provided along the inner edge of the left and right identical semi-circular bodies of the annular clamp, and a groove is provided on the outer edge, so that the lower ends of the multiple support columns are movably connected with the groove on the outer edge of the annular clamp, and the upper ends are connected to the horizontal fixing plate; The rear ends of the left and right identical semicircular bodies of the annular hoop are hinged to each other through a hinge shaft, and the front ends are respectively provided with upper and lower horizontal protrusion pairs extending forward, a horizontal cylindrical hole is provided between one of the upper and lower horizontal protrusion pairs, and a horizontal bolt passes through the horizontal cylindrical hole and extends to the outside of the horizontal cylindrical hole between the other upper and lower horizontal protrusion pairs and is screwed with a nut, so that the horizontal annular chuck provided on the excitation switch can be locked by the annular hoop and the hinge shaft, the upper and lower horizontal protrusion pairs, the horizontal cylindrical holes, the bolts and the nuts thereon. Since the hoop is movably connected to the lower end of the support column, the support column and the bracket can be installed after the hoop locks the horizontal annular chuck and the excitation switch.

[0010] Furthermore, the rotating assembly includes: a horizontal turntable, an L-shaped bracket, a connecting piece, a horizontal limit block, a spring, and a pressure touch switch; wherein: The horizontal turntable is movably arranged in the circular groove at the bottom of the fixed plate of the bracket and is connected to the main shaft of the motor passing through the fixed plate, so that the horizontal turntable rotates synchronously under the drive of the motor; The L-shaped bracket is eccentrically arranged at the bottom of the horizontal turntable through its horizontal section, and the vertical section of the L-shaped bracket extends downward and is connected to the connecting member, and the connecting member includes: a vertical rod connected to the vertical section of the L-shaped bracket, a rectangular block protruding outward is provided in the middle of the vertical rod, and upper and lower horizontal rods connected to the upper and lower ends of the vertical rod; The horizontal limit block is movably arranged between the upper and lower horizontal rods through the vertical rotating shaft, so that the horizontal limit block can swing left and right between the upper and lower horizontal rods, and a protrusion for contacting the voltage regulating gear piece is provided on the left side of the front end of the horizontal limit block, and the right side of the front end of the horizontal limit block is connected to the rectangular block through the spring, and the pressure touch switch is arranged between the vertical rod and the horizontal limit block, and the pressure touch switch is electrically connected to the control box; so that when the horizontal turntable rotates synchronously under the drive of the motor, the protrusion on the left side of the front end of the horizontal limit block is pushed by the L-shaped bracket eccentrically connected to the horizontal turntable and the vertical rod compression spring to drive the voltage regulating gear piece to drive the rotating adjustment shaft to rotate, thereby completing the automatic voltage regulation of the transformer voltage, and when the rotating adjustment shaft drives the excitation switch to adjust the gear, the horizontal limit block will contact the pressure touch switch; when the rotating assembly and the voltage regulating gear piece are separated due to an accident, the horizontal limit block will be reset and separated from the pressure touch switch under the push of the spring, thereby sending an alarm signal to the outside through the control box.

[0011] Furthermore, the eccentric distance between the connecting member and the horizontal turntable is calculated according to the following formula:

[0012] In the formula: r is the eccentric distance between the connecting piece and the horizontal turntable, M is the torque required to push the rotating adjustment shaft, and F is the torque of the motor. Through the eccentric setting of the connecting piece, only a small power motor is needed to push the rotating adjustment shaft on the excitation switch to rotate, which simplifies the transmission structure and reduces the investment in high-power motors, thereby reducing costs.

[0013] Furthermore, the pressure-adjusting shift plate comprises: a sleeve fixedly mounted on the rotating adjustment shaft, and a paddle connected to the sleeve, wherein: The sleeve is composed of two identical front and rear semi-cylinders, and the two sides of the front and rear semi-cylinders are respectively provided with a narrow vertical clamping plate and a wide vertical clamping plate extending outward, the narrow vertical clamping plates are connected as a whole, and the wide vertical clamping plates are connected to the inner end of the paddle by bolts and nuts, and the outer end of the paddle extends horizontally outward and matches with the protrusion on the left side of the front end of the horizontal limit block, so that the paddle can be pushed to rotate by the protrusion on the left side of the front end of the horizontal limit block on the rotating assembly, and then the rotating adjustment shaft is driven to rotate and adjust the pressure through the paddle.

[0014] Furthermore, the magnetic induction component is composed of a plurality of magnetic induction sensors arranged at intervals around the fixed disk, the installation positions of the plurality of magnetic induction sensors correspond one-to-one to the voltage regulating gears on the excitation switch, and the plurality of magnetic induction sensors are electrically connected to the control box for sending position signals of the voltage regulating gears of the excitation switch to the control box, the magnetic induction sensor includes a rectangular shell whose upper end is connected to the outer edge of the fixed disk and whose lower end extends vertically downward, a magnetic sensor matched with the voltage regulating gear piece is provided at the lower end of the rectangular shell, and an indicator light is also provided on the rectangular shell so that the position information of the voltage regulating gear piece sensed by the plurality of magnetic induction sensors can be sent to the control box, thereby controlling the rotation of the motor through the control box, and then pushing the paddle to rotate through the rotating assembly, and then adjusting the position of the voltage regulating gear piece by driving the rotating adjustment shaft to rotate through the paddle, thereby realizing precise voltage regulation of the transformer.

[0015] Furthermore, the control box includes a box body, a main control module and a power supply module arranged in the box body, the power supply module is electrically connected to the main control module for supplying power to the main control module, and the main control module is electrically connected to the motor, the magnetic induction component, and the pressure touch switch for receiving the induction signal transmitted back by the magnetic induction component, thereby controlling the rotation of the motor.

[0016] Furthermore, the control box is electrically connected to an external control cabinet, and a display control panel is provided in the external control cabinet. The display control panel is electrically connected to the control box and the transformer, so that the transformer voltage can be monitored through the external control cabinet, and instructions are sent to the control box according to the monitored voltage value, so that the control box controls the motor to rotate, and then drives the rotating adjustment shaft to adjust the position of the voltage regulating gear piece through the rotating component, and finally completes the voltage regulation to ensure that the transformer operates in the best working state.

[0017] The present invention has the following advantages and effects: 1. Improve the accuracy and safety of transformer gear adjustment: Traditional transformer voltage gear adjustment relies on manual operation. Operators need to climb up the transformer to perform high-altitude adjustment, which poses a great safety risk and is difficult to ensure the accuracy of adjustment. The present invention uses an electric motor to drive the gear jump to achieve remote automatic gear adjustment, eliminating the potential safety hazards during manual adjustment. The gear adjustment accuracy is improved, avoiding errors in manual operation. After actual testing, the gear adjustment accuracy is improved to 0.1 gear, which is 5 times higher than the error of traditional manual adjustment (about 0.5 gear), and the adjustment process is more stable and reliable. 2. Reduce manual operation and improve work efficiency: Traditional transformer voltage level adjustment requires on-site collaboration of multiple people. Manual adjustment is frequent and inaccurate, resulting in low work efficiency and prone to misoperation. Through intelligent control and remote adjustment, operators only need to adjust the transformer level through the control panel, which greatly reduces the need for on-site manual operation, improves work efficiency by about 30%, reduces on-site manual operation by about 40%, and effectively saves human resources and time costs; 3. Improve the stability and reliability of the power distribution system: In traditional systems, gear adjustment and voltage monitoring are not real-time enough, and voltage fluctuations may cause damage to the transformer or instability of the power distribution system, affecting power supply reliability. The present invention ensures that the transformer operates in the best working state through automatic adjustment and real-time monitoring, reduces the risk of voltage fluctuations, and improves the stability of the power system. In actual applications, the voltage qualification rate is increased by 10%, and the failure rate is reduced by about 15%. The stability of the system is significantly improved, and equipment failures caused by voltage fluctuations are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is the installation schematic diagram of the present invention; Figure 2 It is a structural diagram of the present invention; Figure 3 is a cross-sectional view of the present invention; Figure 4 A top view of the present invention; Figure 5 It is a structural diagram of the rotating assembly of the present invention; Figure 6 It is a side view of the rotating assembly of the present invention; Figure 7 This is a structural diagram of the voltage regulating gear piece of the present invention.

[0020] In the figure, 1. transformer, 2. excitation switch, 3. control box, 4. bracket, 5. motor protection shell, 6. fixed plate, 7. bushing, 8. rotation adjustment shaft, 9. support column, 10. horizontal annular chuck, 11. upper and lower horizontal protrusion pairs, 12. horizontal cylindrical hole, 13. horizontal cylindrical hole, 14. nut, 15. clamp, 16. hinge shaft, 17. paddle, 18. wide vertical splint, 19. magnetic induction sensor, 20. horizontal turntable, 21. motor, 22. main control module, 23. power module, 24. indicator light, 25. magnetic sensor, 26. groove, 27. horizontal limit block, 28. spring, 29. protrusion, 30. pressure touch switch, 31. upper and lower horizontal rods, 32. rectangular block, 33. vertical rod, 34. L-shaped bracket. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0022] The automatic voltage regulating device for a transformer provided by the present invention comprises a bracket 4, an excitation switch 2, an excitation switch fixing mechanism, a rotary adjustment shaft 8, a motor 21, a rotating assembly, a voltage regulating shift plate, a magnetic induction assembly, and a control box 3; wherein: The bracket 4 is arranged on the transformer 1, and an excitation switch fixing mechanism and an excitation switch 2 are arranged below the bracket 4, and a rotating adjustment shaft 8 is sleeved inside the excitation switch 2, and the upper end of the rotating adjustment shaft 8 is connected to the voltage regulating shift piece, and the lower end is connected to the excitation switch 2, so that after the rotating assembly and the voltage regulating shift piece rotate under the push of external force, the rotating adjustment shaft 8 is driven to rotate, thereby adjusting the gear of the excitation switch 2 to complete the voltage regulation of the transformer 1; The bracket 4 is provided with the motor 21, the main shaft of the motor 21 is connected to the rotating assembly, and the rotating assembly is coaxially matched with the pressure regulating shift plate to drive the pressure regulating shift plate to rotate. The bracket 4 is provided with the magnetic induction component, which is matched with the rotating component. The control box 3 is electrically connected to the motor 21 and the magnetic induction component. When the voltage of the transformer 1 needs to be adjusted, the motor 21 drives the rotating component and the voltage regulating gear piece to rotate, and then drives the rotating adjustment shaft 8 to rotate, so that the rotating adjustment shaft 8 drives the excitation switch 2 to adjust the gear, and completes the voltage regulation of the transformer 1; and in the adjustment process, through the magnetic induction component matched with the rotating component, the control box 3 can control the rotation angle of the rotating component, thereby realizing the precise voltage regulation of the transformer 1, ensuring that the transformer 1 operates in the best working state, reducing the risk of voltage fluctuations, and improving the stability of the power system.

[0023] As an embodiment, the bracket 4 includes a motor protection shell 5, a control box 3 is provided on the top of the motor protection shell 5, and a fixed disk 6 is provided on the bottom of the motor protection shell 5. The fixed disk 6 is connected to the excitation switch fixing mechanism below through multiple supporting columns 9 on all sides. The motor 21 is placed in the motor protection shell 5, and the main axis of the motor 21 passes downward through the fixed disk 6 and is connected to the rotating component, so that the motor 21 and the rotating component can be fixed above the excitation switch 2 through the bracket 4, and the motor 21 can drive the rotating component to promote the voltage regulating gear plate to rotate, and then drive the rotating adjustment shaft 8 to rotate, so that the rotating adjustment shaft 8 drives the excitation switch 2 to adjust the gear, thereby completing the automatic voltage regulation of the transformer 1 voltage.

[0024] As an embodiment, the excitation switch fixing mechanism includes: a horizontal annular chuck 10 composed of two identical left and right semi-circular bodies, the horizontal annular chuck 10 is sleeved on the excitation switch 2 through its center hole, and the outer edge of the horizontal annular chuck 10 is sleeved with a circular clamp 15, which is composed of two identical left and right semi-circular bodies; along the inner edges of the left and right identical semi-circular bodies of the annular clamp 15, there are provided a clamping groove matched with the outer edge of the horizontal annular chuck 10, and a groove 26 is provided on the outer edge, so that the lower ends of the multiple support columns 9 are movably connected with the groove 26 on the outer edge of the annular clamp 15, and the upper ends are connected to the horizontal fixing plate 6; The rear ends of the left and right identical semicircular bodies of the annular hoop 15 are hinged to each other through a hinge shaft 16, and the front ends are respectively provided with upper and lower horizontal protrusion pairs 11 extending forward, wherein a horizontal cylindrical hole 12 is provided between one of the upper and lower horizontal protrusion pairs 11, and a horizontal bolt passes through the horizontal cylindrical hole 12 and extends to the outside of the horizontal cylindrical hole 13 between the other upper and lower horizontal protrusion pairs 11 and is screwed with a nut 14, so that the horizontal annular chuck 10 sleeved on the excitation switch 2 can be locked by the annular hoop 15 and the hinge shaft 16 thereon, the upper and lower horizontal protrusion pairs 11, the horizontal cylindrical holes 12 and 13, the bolts and the nuts 14. Since the hoop 15 is movably connected to the lower end of the support column 9, the support column 9 and the bracket 4 can be installed after the hoop 15 locks the horizontal annular chuck 10 and the excitation switch 2.

[0025] As an embodiment, the rotating assembly includes: a horizontal turntable 20, an L-shaped bracket 34, a connecting piece, a horizontal limit block 27, a spring 28, and a pressure touch switch 30; wherein: The horizontal turntable 20 is movably disposed in a circular groove at the bottom of the fixed plate 6 of the bracket 4, and is connected to the main shaft of the motor 21 passing through the fixed plate 6, so that the horizontal turntable 20 rotates synchronously driven by the motor 21; The L-shaped bracket 34 is eccentrically arranged at the bottom of the horizontal turntable 20 through its horizontal section, and the vertical section of the L-shaped bracket 34 extends downward and is connected to the connecting member, and the connecting member includes: a vertical rod 33 connected to the vertical section of the L-shaped bracket 34, a rectangular block 32 protruding outward is provided in the middle of the vertical rod 33, and upper and lower horizontal rods 31 connected to the upper and lower ends of the vertical rod 33; The horizontal limit block 27 is movably arranged between the upper and lower horizontal rods 31 through a vertical rotating shaft, so that the horizontal limit block 27 can swing left and right between the upper and lower horizontal rods 31. The left side of the front end of the horizontal limit block 27 is provided with a protrusion 29 for contacting the pressure-adjusting shift plate. The right side of the front end of the horizontal limit block 27 is connected to the rectangular block 32 through the spring 28. The pressure touch switch 30 is arranged between the vertical rod 33 and the horizontal limit block 27. The pressure touch switch 30 is electrically connected to the control box 3; so that the horizontal turntable 20 rotates synchronously under the drive of the motor 21. By compressing the spring 28 through the L-shaped bracket 34 and the vertical rod 33 eccentrically connected to the horizontal turntable 20, the protrusion 29 on the left side of the front end of the horizontal limit block 27 pushes the voltage regulating shift plate to drive the rotating adjustment shaft 8 to rotate, thereby completing the automatic voltage regulation of the transformer 1. When the rotating adjustment shaft 8 drives the excitation switch 2 to adjust the gear, the horizontal limit block 27 will contact the pressure touch switch 30; when the rotating component and the voltage regulating shift plate are separated due to an accident, the horizontal limit block 27 will be reset under the push of the spring 28 and separated from the pressure touch switch 30, thereby sending an alarm signal to the outside through the control box 3.

[0026] As an embodiment, the eccentric distance between the connecting member and the horizontal turntable 20 is calculated according to the following formula:

[0027] In the formula: r is the eccentric distance between the connecting piece and the horizontal turntable 20, M is the torque required to push the rotating adjustment shaft 8, and F is the torque of the motor 21, so that through the eccentric setting of the connecting piece, only a small power motor 21 is needed to push the rotating adjustment shaft 8 on the excitation switch 2 to rotate, which simplifies the transmission structure and reduces the investment in high-power motors, thereby reducing costs.

[0028] As an embodiment, the pressure regulating shift plate comprises: a sleeve 7 fixedly mounted on the rotating regulating shaft 8, and a paddle 17 connected to the sleeve 7, wherein: The sleeve 7 is composed of two identical front and rear semi-cylinders, and the two sides of the front and rear identical semi-cylinders are respectively provided with a narrow vertical clamp plate and a wide vertical clamp plate 18 extending outward, the narrow vertical clamp plates are connected as a whole, and the wide vertical clamp plates 18 are connected to the inner end of the paddle 17 by bolts and nuts. The outer end of the paddle 17 extends horizontally outward and matches with the protrusion 29 on the left side of the front end of the horizontal limit block 27, so that the paddle 17 can be pushed to rotate by the protrusion 29 on the left side of the front end of the horizontal limit block 27 on the rotating assembly, and then the rotating adjustment shaft 8 is driven to rotate and adjust the pressure through the paddle 17.

[0029] As an embodiment, the magnetic induction component is composed of a plurality of magnetic induction sensors 19 arranged at intervals around the fixed disk 6, the installation positions of the plurality of magnetic induction sensors 19 correspond one-to-one to the voltage regulating gears on the excitation switch 2, and the plurality of magnetic induction sensors 19 are electrically connected to the control box 3, and are used to send position signals of the voltage regulating gears of the excitation switch 2 to the control box 3, the magnetic induction sensor 19 includes a rectangular shell whose upper end is connected to the outer edge of the fixed disk 6 and whose lower end extends vertically downward, a magnetic sensor 25 matched with the voltage regulating gear piece is provided at the lower end of the rectangular shell, and an indicator light 24 is also provided on the rectangular shell, so that the position information of the voltage regulating gear piece sensed by the plurality of magnetic induction sensors 19 is sent to the control box 3, thereby controlling the motor 21 to rotate through the control box 3, and then pushing the paddle 17 to rotate through the rotating assembly, and then driving the rotating adjustment shaft 8 to rotate through the paddle 17 to adjust the position of the voltage regulating gear piece, thereby realizing precise voltage regulation of the transformer 1.

[0030] As an embodiment, the control box 3 includes a box body, a main control module 22 and a power module 23 arranged in the box body, the power module 23 is electrically connected to the main control module 22, and is used to supply power to the main control module 22, and the main control module 22 is electrically connected to the motor 21, the magnetic induction component, and the touch switch 30, and is used to receive the induction signal transmitted back by the magnetic induction component, thereby controlling the rotation of the motor 21.

[0031] As an embodiment, the control box 3 is electrically connected to an external control cabinet, and a display control panel is provided in the external control cabinet. The display control panel is electrically connected to the control box 3 and the transformer 1, so as to monitor the voltage of the transformer 1 through the external control cabinet, and send instructions to the control box 3 according to the monitored voltage value, so that the control box 3 controls the motor 21 to rotate, and then drives the rotating adjustment shaft 8 to adjust the position of the voltage regulating gear piece through the rotating component, and finally completes the voltage regulation to ensure that the transformer 1 operates in the best working state. Example 2

[0032] The automatic voltage regulating device for a transformer provided by the present invention comprises a bracket 4, an excitation switch 2, an excitation switch fixing mechanism, a rotary adjustment shaft 8, a hydraulic motor 21, a rotary assembly, a voltage regulating shift plate, a magnetic induction assembly, and a control box 3; wherein: The bracket 4 is arranged on the transformer 1, and an excitation switch fixing mechanism and an excitation switch 2 are arranged below the bracket 4, and a rotating adjustment shaft 8 is sleeved inside the excitation switch 2, and the upper end of the rotating adjustment shaft 8 is connected to the voltage regulating shift piece, and the lower end is connected to the excitation switch 2, so that after the rotating assembly and the voltage regulating shift piece rotate under the push of external force, the rotating adjustment shaft 8 is driven to rotate, thereby adjusting the gear of the excitation switch 2 to complete the voltage regulation of the transformer 1; The bracket 4 is provided with the hydraulic motor 21, the main shaft of the hydraulic motor 21 is connected to the rotating assembly, and the hydraulic motor 21 is connected to the hydraulic oil pump through a hydraulic oil pipeline, the rotating assembly is coaxially matched with the pressure regulating shift plate, and is used to drive the pressure regulating shift plate to rotate, the bracket 4 is provided with the magnetic induction component, and the magnetic induction component is matched with the rotating assembly, and the control box 3 is electrically connected to the oil pump and the magnetic induction component; When the voltage of the transformer 1 needs to be adjusted, the hydraulic motor 21 drives the rotating component and the voltage regulating shift piece to rotate, and then drives the rotating adjustment shaft 8 to rotate, so that the rotating adjustment shaft 8 drives the excitation switch 2 to adjust the gear, and completes the voltage adjustment of the transformer 1; and in the adjustment process, through the magnetic induction component matched with the rotating component, the control box 3 can control the rotation angle of the rotating component, thereby realizing the precise voltage regulation of the transformer 1, ensuring that the transformer 1 operates in the best working state, reducing the risk of voltage fluctuations, and improving the stability of the power system.

[0033] As an embodiment, the bracket 4 includes a hydraulic motor protective shell 5, a control box 3 is provided on the top of the hydraulic motor protective shell 5, a fixed plate 6 is provided on the bottom of the hydraulic motor protective shell 5, and the fixed plate 6 is connected to the excitation switch fixing mechanism below through multiple supporting columns 9 on all sides. The hydraulic motor 21 is placed in the hydraulic motor protective shell 5, and the main shaft of the hydraulic motor 21 passes downward through the fixed plate 6 and is connected to the rotating component, so that the hydraulic motor 21 and the rotating component can be fixed above the excitation switch 2 through the bracket 4, and the hydraulic motor 21 can drive the rotating component to promote the voltage regulating gear plate to rotate, and then drive the rotating adjustment shaft 8 to rotate, so that the rotating adjustment shaft 8 drives the excitation switch 2 to adjust the gear, thereby completing the automatic voltage regulation of the transformer 1 voltage.

[0034] In this embodiment, the input end of the hydraulic motor 21 is connected to the output end of the hydraulic oil pump through an oil inlet pipe, the input end of the hydraulic pump is connected to the output end of the hydraulic oil tank through a first oil outlet pipe, and the input end of the hydraulic oil tank is connected to the output end of the hydraulic motor 21 through a second oil outlet pipe, so that the hydraulic motor 21 drives the rotating component to rotate under the drive of the hydraulic pump.

[0035] The output end of the hydraulic motor is connected to the input end of the hydraulic oil tank through the first oil outlet pipeline, and the output end of the hydraulic oil tank is connected to the input end of the hydraulic oil pump through the second oil outlet pipeline. As an embodiment, the excitation switch fixing mechanism includes: a horizontal annular chuck 10 composed of two identical left and right semi-circular bodies, the horizontal annular chuck 10 is sleeved on the excitation switch 2 through its center hole, and the outer edge of the horizontal annular chuck 10 is sleeved with a circular clamp 15, which is composed of two identical left and right semi-circular bodies; along the inner edges of the left and right identical semi-circular bodies of the annular clamp 15, there are provided a clamping groove matched with the outer edge of the horizontal annular chuck 10, and a groove 26 is provided on the outer edge, so that the lower ends of the multiple support columns 9 are movably connected with the groove 26 on the outer edge of the annular clamp 15, and the upper ends are connected to the horizontal fixing plate 6; The rear ends of the left and right identical semicircular bodies of the annular hoop 15 are hinged to each other through a hinge shaft 16, and the front ends are respectively provided with upper and lower horizontal protrusion pairs 11 extending forward, wherein a horizontal cylindrical hole 12 is provided between one of the upper and lower horizontal protrusion pairs 11, and a horizontal bolt passes through the horizontal cylindrical hole 12 and extends to the outside of the horizontal cylindrical hole 13 between the other upper and lower horizontal protrusion pairs 11 and is screwed with a nut 14, so that the horizontal annular chuck 10 sleeved on the excitation switch 2 can be locked by the annular hoop 15 and the hinge shaft 16 thereon, the upper and lower horizontal protrusion pairs 11, the horizontal cylindrical holes 12 and 13, the bolts and the nuts 14. Since the hoop 15 is movably connected to the lower end of the support column 9, the support column 9 and the bracket 4 can be installed after the hoop 15 locks the horizontal annular chuck 10 and the excitation switch 2.

[0036] As an embodiment, the rotating assembly includes: a horizontal turntable 20, an L-shaped bracket 34, a connecting piece, a horizontal limit block 27, a spring 28, and a pressure touch switch 30; wherein: The horizontal turntable 20 is movably disposed in a circular groove at the bottom of the fixed plate 6 of the bracket 4, and is connected to the main shaft of the hydraulic motor 21 passing through the fixed plate 6, so that the horizontal turntable 20 rotates synchronously under the drive of the hydraulic motor 21; The L-shaped bracket 34 is eccentrically arranged at the bottom of the horizontal turntable 20 through its horizontal section, and the vertical section of the L-shaped bracket 34 extends downward and is connected to the connecting member, and the connecting member includes: a vertical rod 33 connected to the vertical section of the L-shaped bracket 34, a rectangular block 32 protruding outward is provided in the middle of the vertical rod 33, and upper and lower horizontal rods 31 connected to the upper and lower ends of the vertical rod 33; The horizontal limit block 27 is movably arranged between the upper and lower horizontal rods 31 through a vertical rotating shaft, so that the horizontal limit block 27 can swing left and right between the upper and lower horizontal rods 31. The left side of the front end of the horizontal limit block 27 is provided with a protrusion 29 for contacting the pressure-adjusting shift plate. The right side of the front end of the horizontal limit block 27 is connected to the rectangular block 32 through the spring 28. The pressure touch switch 30 is arranged between the vertical rod 33 and the horizontal limit block 27. The pressure touch switch 30 is electrically connected to the control box 3; so that the horizontal turntable 20 rotates synchronously under the drive of the hydraulic motor 21. , through the L-shaped bracket 34 and the vertical rod 33 eccentrically connected to the horizontal turntable 20, the spring 28 is compressed to make the protrusion 29 on the left side of the front end of the horizontal limit block 27 push the voltage regulating shift piece to drive the rotating adjustment shaft 8 to rotate, thereby completing the automatic voltage regulation of the transformer 1 voltage, and when the rotating adjustment shaft 8 drives the excitation switch 2 to adjust the gear, the horizontal limit block 27 will contact with the pressure touch switch 30; when the rotating assembly and the voltage regulating shift piece are separated due to an accident, the horizontal limit block 27 will be reset under the push of the spring 28 and separated from the pressure touch switch 30, thereby sending an alarm signal to the outside through the control box 3.

[0037] As an embodiment, the eccentric distance between the connecting member and the horizontal turntable 20 is calculated according to the following formula:

[0038] In the formula: r is the eccentric distance between the connecting piece and the horizontal turntable 20, M is the torque required to push the rotating adjustment shaft 8, and F is the torque of the hydraulic motor 21, so that through the eccentric setting of the connecting piece, only a small-power hydraulic motor 21 is needed to push the rotating adjustment shaft 8 on the excitation switch 2 to rotate, which simplifies the transmission structure and reduces the investment in high-power hydraulic motors, thereby reducing costs.

[0039] As an embodiment, the pressure regulating shift plate comprises: a sleeve 7 fixedly sleeved on the rotating regulating shaft 8, and a paddle 17 connected to the sleeve 7, wherein: The sleeve 7 is composed of two identical front and rear semi-cylinders, and the two sides of the front and rear identical semi-cylinders are respectively provided with a narrow vertical clamp plate and a wide vertical clamp plate 18 extending outward, the narrow vertical clamp plates are connected as a whole, and the wide vertical clamp plates 18 are connected to the inner end of the paddle 17 by bolts and nuts. The outer end of the paddle 17 extends horizontally outward and matches with the protrusion 29 on the left side of the front end of the horizontal limit block 27, so that the paddle 17 can be pushed to rotate by the protrusion 29 on the left side of the front end of the horizontal limit block 27 on the rotating assembly, and then the rotating adjustment shaft 8 is driven to rotate and adjust the pressure through the paddle 17.

[0040] As an embodiment, the magnetic induction component is composed of a plurality of magnetic induction sensors 19 arranged at intervals around the fixed disk 6, the installation positions of the plurality of magnetic induction sensors 19 correspond one-to-one to the voltage regulating gears on the excitation switch 2, and the plurality of magnetic induction sensors 19 are electrically connected to the control box 3, and are used to send position signals of the voltage regulating gears of the excitation switch 2 to the control box 3, the magnetic induction sensor 19 includes a rectangular shell whose upper end is connected to the outer edge of the fixed disk 6 and whose lower end extends vertically downward, a magnetic sensor 25 matched with the voltage regulating gear piece is provided at the lower end of the rectangular shell, and an indicator light 24 is also provided on the rectangular shell, so that the position information of the voltage regulating gear piece sensed by the plurality of magnetic induction sensors 19 is sent to the control box 3, thereby controlling the rotation of the hydraulic motor 21 through the control box 3, and then pushing the paddle 17 to rotate through the rotating assembly, and then driving the rotating adjustment shaft 8 to rotate through the paddle 17 to adjust the position of the voltage regulating gear piece, thereby realizing precise voltage regulation of the transformer 1.

[0041] As an embodiment, the control box 3 includes a box body, a main control module 22 and a power module 23 arranged in the box body, and a solar power generation module arranged on the box body, wherein the solar power generation module is electrically connected to the power module 23, and the power module 23 is electrically connected to the main control module 22 for supplying power to the main control module 22, and the main control module 22 is electrically connected to the hydraulic oil pump, the magnetic induction component, and the pressure touch switch 30 for receiving the induction signal transmitted back by the magnetic induction component, thereby controlling the hydraulic oil pump to rotate the hydraulic motor 21.

[0042] As an embodiment, the control box 3 is electrically connected to an external control cabinet, and a display control panel is provided in the external control cabinet. The display control panel is electrically connected to the control box 3 and the transformer 1, so as to monitor the voltage of the transformer 1 through the external control cabinet, and send instructions to the control box 3 according to the monitored voltage value, so that the control box 3 controls the hydraulic oil pump to rotate the hydraulic motor 21, and then drives the rotating adjustment shaft 8 to adjust the position of the voltage regulating gear plate through the rotating component, and finally completes the voltage regulation to ensure that the transformer 1 operates in the best working state.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic voltage regulating device for a transformer, comprising a bracket, an excitation switch, an excitation switch fixing mechanism, a rotating adjustment shaft, a motor, a rotating assembly, a voltage regulating shift piece, a magnetic induction assembly, and a control box; wherein: The bracket is arranged on the transformer, and an excitation switch fixing mechanism and an excitation switch are arranged at the lower part of the bracket, and a rotating adjustment shaft is sleeved in the excitation switch, and the upper end of the rotating adjustment shaft is connected to the voltage regulating shift piece, and the lower end is connected to the excitation switch, so that after the rotating assembly and the voltage regulating shift piece rotate under the push of external force, the rotating adjustment shaft is driven to rotate, thereby adjusting the gear of the excitation switch to complete the voltage regulation of the transformer; The motor is provided on the bracket, and the motor main shaft is connected to the rotating component. The rotating component is coaxially matched with the voltage regulating shift plate to push the voltage regulating shift plate to rotate. The magnetic induction component is provided on the bracket, and the magnetic induction component is matched with the rotating component. The control box is electrically connected to the motor and the magnetic induction component.

2. The automatic voltage regulating device for transformer according to claim 1, characterized in that The bracket includes a motor protection shell, a control box is provided on the top of the motor protection shell, and a fixed plate is provided at the bottom of the motor protection shell. The fixed plate is connected to the excitation switch fixing mechanism below through multiple supporting columns around it. The motor is placed in the motor protection shell, and the motor main shaft passes downward through the fixed plate and is connected to the rotating assembly.

3. The automatic voltage regulating device for transformer according to claim 1, characterized in that The excitation switch fixing mechanism comprises: a horizontal annular chuck composed of two identical left and right semi-circular bodies, the horizontal annular chuck is sleeved on the excitation switch through its central hole, the outer edge of the horizontal annular chuck is sleeved with a circular hoop, the circular hoop is composed of two identical left and right semi-circular bodies; a clamping groove matched with the outer edge of the horizontal annular chuck is provided along the inner edge of the left and right identical semi-circular bodies of the circular hoop, and a groove is provided on the outer edge, so that the lower ends of the multiple support columns are movably connected with the groove on the outer edge of the circular hoop, and the upper ends are connected to the horizontal fixing plate; The rear ends of the left and right identical semicircular bodies of the annular clamp are hinged to each other through a hinge shaft, and the front ends are respectively provided with upper and lower horizontal protrusion pairs extending forward, and a horizontal cylindrical hole is provided between one of the upper and lower horizontal protrusion pairs. The horizontal bolt passes through the horizontal cylindrical hole and extends to the outside of the horizontal cylindrical hole between the other upper and lower horizontal protrusion pairs and is screwed with a nut.

4. The automatic voltage regulating device for transformer according to claim 1, characterized in that The rotating assembly includes: a horizontal turntable, an L-shaped bracket, a connecting piece, a horizontal limit block, a spring, and a pressure touch switch; wherein: The horizontal turntable is movably arranged in a circular groove at the bottom of the fixed plate of the bracket and is connected to a motor main shaft passing through the fixed plate, so that the horizontal turntable rotates synchronously driven by the motor; The L-shaped bracket is eccentrically arranged at the bottom of the horizontal turntable through its horizontal section, and the vertical section of the L-shaped bracket extends downward and is connected to the connecting member, and the connecting member includes: a vertical rod connected to the vertical section of the L-shaped bracket, a rectangular block protruding outward is provided in the middle of the vertical rod, and upper and lower horizontal rods connected to the upper and lower ends of the vertical rod; The horizontal limit block is movably arranged between the upper and lower horizontal rods through a vertical rotating shaft, so that the horizontal limit block can swing left and right between the upper and lower horizontal rods. A protrusion for contacting the pressure regulating shift plate is provided on the left side of the front end of the horizontal limit block. The right side of the front end of the horizontal limit block is connected to the rectangular block through the spring. The pressure touch switch is arranged between the vertical rod and the horizontal limit block, and the pressure touch switch is electrically connected to the control box.

5. The automatic voltage regulating device for transformer according to claim 4, characterized in that The eccentric distance between the connecting member and the horizontal turntable is calculated according to the following formula: ； Where: r is the eccentric distance between the connecting piece and the horizontal turntable, M is the torque required to push the rotating adjustment shaft, and F is the torque of the motor.

6. The automatic voltage regulating device for transformer according to claim 1, characterized in that The pressure-adjusting shift plate comprises: a shaft sleeve fixedly mounted on the rotating adjustment shaft, and a paddle connected to the shaft sleeve, wherein: The sleeve is composed of two identical front and rear semi-cylinders, and the two sides of the front and rear semi-cylinders are respectively provided with a narrow vertical clamping plate and a wide vertical clamping plate extending outward, the narrow vertical clamping plates are connected as a whole, and the wide vertical clamping plates are connected to the inner end of the paddle by bolts and nuts, and the outer end of the paddle extends horizontally outward and matches with the protrusion on the left side of the front end of the horizontal limit block.

7. The automatic voltage regulating device for transformer according to claim 1, characterized in that The magnetic induction component is composed of a plurality of magnetic induction sensors arranged at intervals around the fixed disk. The installation positions of the plurality of magnetic induction sensors correspond one-to-one to the voltage regulating gears on the excitation switch, and the plurality of magnetic induction sensors are electrically connected to the control box for sending position signals of the voltage regulating gears of the excitation switch to the control box. The magnetic induction sensor includes a rectangular shell whose upper end is connected to the outer edge of the fixed disk and whose lower end extends vertically downward. A magnetic sensor matched with the voltage regulating gear plate is provided at the lower end of the rectangular shell, and an indicator light is also provided on the rectangular shell.

8. The automatic voltage regulating device for transformer according to claim 1, characterized in that The control box includes a box body, a main control module and a power module arranged in the box body, the power module is electrically connected to the main control module for supplying power to the main control module, and the main control module is electrically connected to the motor, the magnetic induction component, and the touch switch for receiving the induction signal transmitted back by the magnetic induction component, thereby controlling the rotation of the motor.

9. The automatic voltage regulating device for transformer according to claim 1, characterized in that The control box is electrically connected to an external control cabinet, a display control panel is arranged in the external control cabinet, and the display control panel is electrically connected to the control box and the transformer.

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