Harmonic filter for improving electric energy quality

Abstract

The invention relates to the technical field of harmonic filters, in particular to a harmonic filter for improving electric energy quality, which comprises a harmonic filter body, and two ends of an outer frame cover in the harmonic filter body are respectively and fixedly connected with a first sealing connecting plate and a second sealing connecting plate through bolts. According to the invention, the two first sliding outer frames and the two second sliding outer frames are uniformly distributed in the outer frame cover in the harmonic filter body, so that a first sealing connecting plate can be taken down according to the needs of maintenance, installation and disassembly and then is independently discharged from the interior of the outer frame cover in a sliding manner; electric push rods uniformly arranged on a second sliding outer frame are started to control a connecting plug to move forwards and extend out to be inserted into a butt joint connecting clamping column, and no matter the position of a driving control gear is located on a sliding driving toothed plate arranged on the first sliding outer frame or the second sliding outer frame; as long as the motor is started to drive the driving control gear to rotate, the first sliding outer frame or the second sliding outer frame synchronously slides outwards to be discharged.

Description

Technical Field

[0001] The present invention relates to the technical field of harmonic filters, in particular to a harmonic filter for improving power quality. Background Art

[0002] In the power system, the operation of nonlinear loads (such as inverters, rectifiers, arc furnaces, etc.) will generate a large amount of harmonic currents and harmonic voltages, resulting in a decrease in power quality, affecting the normal operation of equipment, and even causing equipment failure, shortening equipment life, and increasing power loss. As a key device for improving power quality, harmonic filters can effectively suppress harmonic pollution and improve the stability and reliability of the power system. Traditional filters have problems such as large size, complex installation, and difficult maintenance. They are difficult to adapt to the flexibility and scalability requirements of modern power systems. Harmonic filters are mainly composed of functional modules and structural modules. Functional modules: core module, including filtering circuits (such as LC filters, active filters APF), control module, responsible for harmonic detection, parameter adjustment and communication, power module, providing DC or AC power required by the filter, interface module, realizing communication with other devices (such as PLC, monitoring system), structural module: standard size, unified module appearance (such as 19-inch rack-mounted, wall-mounted), connection interface, using standardized connectors (such as IEC 60320, M12 aviation plug), heat dissipation design, independent heat dissipation of modules to avoid thermal coupling, each module and other necessary components are concentrated inside the harmonic filter, the wiring connection is complicated, and when inspecting and replacing internal components and modules, the entire harmonic filter needs to be disassembled to expose all components, making it inconvenient to inspect, install, use, and adjust the harmonic filter. In addition, the position angle of the harmonic filter cannot be easily adjusted after it is fixed. Therefore, a device is needed to solve the above problems. Summary of the Invention

[0003] In view of the problems in the prior art, the present invention provides a harmonic filter for improving power quality.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A harmonic filter for improving power quality, comprising a harmonic filter body, wherein the ends of an outer frame cover in the harmonic filter body are respectively fixedly connected with a first sealing connecting plate and a second sealing connecting plate by bolts, the side ends of the first sealing connecting plate facing away from the outer frame cover are evenly fixed with connecting ends, and sealing protective covers are fixedly installed on both sides of one end of the outer frame cover close to the connecting end by bolts, and a limiting support frame is fixedly installed inside the outer frame cover by bolts, and modular mounting parts are symmetrically arranged on the limiting support frame.

[0005] Preferably, mounting grooves are provided on both sides of the front end of the outer frame cover, first sliding limit slots are provided on both sides of the mounting groove, and second sliding limit slots are provided in the middle and on both sides of the limit support frame.

[0006] Preferably, the modular mounting portion includes a sliding drive tooth plate, a limit adjustment card plate, a third sliding limit card slot, a fixed mounting plate, a first sliding outer frame, a fixed threaded hole, a fixed threaded column, a sliding mounting bracket, a mounting hole, and a second sliding outer frame, the first sliding outer frame and the second sliding outer frame are symmetrically distributed, and a limit adjustment card plate is provided inside the first sliding outer frame and the second sliding outer frame, and the upper ends of both sides of the limit adjustment card plate are fixedly installed with a fixed mounting plate, and the fixed mounting plate is fixedly mounted on the first sliding outer frame by bolts, the fixed threaded holes are evenly provided on the limit adjustment card plate, the third sliding limit card slot is evenly provided on the limit adjustment card plate, the two sides of the sliding mounting bracket are slidably clamped on the third sliding limit card slot, the mounting holes are evenly penetrated and provided on the sliding mounting bracket, the fixed threaded column is threadedly inserted into both sides of the sliding mounting bracket, and the fixed threaded column is adapted to the fixed threaded hole, the sliding drive tooth plate is symmetrically fixedly mounted on the inner sides of the upper ends of the first sliding outer frame and the second sliding outer frame by bolts, and each frame is correspondingly provided with two driving tooth plates.

[0007] Preferably, mounting support plates are fixedly mounted inside the bottom ends of the first sliding outer frame and the second sliding outer frame, cooling fans are evenly fixedly mounted on the mounting support plates, and the cooling fans are located directly below the sliding mounting frame.

[0008] Preferably, a sliding adjustment bracket is provided above the second sliding outer frame, and limit mounting vertical plates are fixedly installed at the bottom of both ends of the sliding adjustment bracket, and a driving control gear is symmetrically installed between the limit mounting vertical plates for rotation. An electric adjustment push rod is provided above the sliding adjustment bracket, and the front end of the electric adjustment push rod is fixedly connected to the middle part of the sliding adjustment bracket, and an electric motor is fixedly installed on the limit mounting vertical plate located on the outside, and the driving end of the motor is fixedly connected to the middle part of the driving control gear.

[0009] Preferably, a docking connection column is evenly fixedly installed on the inner side of the end of the first sliding outer frame, and an electric push rod is evenly fixedly installed on the inner side of the end of the second sliding outer frame. The front end of the electric push rod is fixedly connected with a connecting plug, and the connecting plug is adapted to the card hole set on the docking connection column.

[0010] Preferably, the first sliding outer frame and the second sliding outer frame are slidably connected to the second sliding limit slot, both sides of the sliding adjustment bracket are slidably connected to the inside of the first sliding limit slot, and the electric adjustment push rod is fixedly installed inside the installation slot.

[0011] Preferably, the two driving control gears are meshedly connected with the sliding driving tooth plates of the corresponding frames, and the sliding adjustment bracket, driving control gears and electric adjustment push rod are all located inside the sealing protective cover.

[0012] Preferably, an auxiliary support adjustment portion is provided at the middle portion of the bottom end of the outer frame cover.

[0013] Preferably, the auxiliary support adjustment part includes a threaded hole, a fixed connecting plate, a fixed mounting hole, a rotating support seat, a fixed plate and a fixed locking bolt, the fixed mounting holes are evenly opened through the edge of the fixed plate, the middle part of the rotating support seat is rotatably clamped in the middle part of the fixed plate, the fixed connecting plate is fixedly connected to the middle part of the upper end of the rotating support seat, the threaded holes are evenly opened on the fixed connecting plate, the rotating support seat and the fixed plate, the fixed locking bolt is threadedly inserted into the rotating support seat and the fixed plate, and the fixed connecting plate is fixedly connected to the middle part of the bottom end of the outer frame cover by a bolt.

[0014] Preferably, a shielding protection device is provided on the outside of the harmonic filter body, and the shielding protection device includes a first rotating shielding cover, a second rotating shielding cover, a driving motor, a driving adjustment gear, a track support plate, a mounting platform, a first rotating adjustment gear ring and a second rotating adjustment gear ring, the mounting platform is fixedly installed on the middle part of the upper end of the track support plate, the bottom ends of the first rotating adjustment gear ring and the second rotating adjustment gear ring are rotatably clamped on the track support plate, and the first rotating adjustment gear ring is located on the outside of the second rotating adjustment gear ring, the bottom end of the second rotating shielding cover is fixedly connected to the outside of the edge of the second rotating adjustment gear ring, the bottom end of the first rotating shielding cover is fixedly connected to the inner edge of the first rotating adjustment gear ring, the driving motor is fixedly installed on the track support plate, and the two driving motors are respectively engaged with the first rotating adjustment gear ring and the second rotating adjustment gear ring.

[0015] The present invention has at least the following beneficial effects:

[0016] 1. The two first sliding outer frames and the second sliding outer frame are evenly distributed inside the outer frame cover in the harmonic filter body of the present invention. The first sealing connecting plate can be removed according to the needs of maintenance, installation and disassembly, and then the first sealing connecting plate can be slid out from the inside of the outer frame cover separately. The electric push rods evenly arranged on the second sliding outer frame are started to control the connecting plug to move forward and extend and insert into the inside of the docking connection column. At this time, no matter whether the driving control gear is located on the sliding drive tooth plate provided on the first sliding outer frame or the second sliding outer frame, as long as the motor is started to drive the driving control gear to rotate, the first sliding outer frame or the second sliding outer frame can be synchronously slid outward and discharged, that is, each frame can be controlled to slide out separately, or the two frames can be controlled to slide out simultaneously. The frame can be quickly dismantled and repaired by the user, and the laser distance sensor is fixed at the front end of the sliding adjustment bracket and located inside the installation slot. The laser distance sensor can determine the distance the sliding adjustment bracket moves and the position of the sliding adjustment bracket, thereby determining whether the driving control gear is located on the sliding driving tooth plate provided on the first sliding outer frame or the second sliding outer frame. The first sliding outer frame and the second sliding outer frame can be accurately controlled to move outward, so that the components installed inside the outer frame cover can be installed and used in a modular manner. In addition, the components or modules at the specified position can be moved out for maintenance or installation and disassembly during the maintenance process.

[0017] 2. During the use of the present invention, even after fixed installation, the position and angle of use can still be conveniently adjusted and controlled as needed. The fixed installation hole can be used to fix the fixed plate, so that the auxiliary support adjustment part is fixed as a whole, so that the harmonic filter body and the auxiliary support adjustment part are fixed together. When the harmonic filter body needs to be adjusted and controlled after it is fixed, the fixed locking bolt is adjusted and screwed so that the fixed locking bolt is screwed out from the inside of the rotating support seat and the fixed plate, so that the fixed connection plate and the rotating support seat can be rotated on the fixed plate to adjust and control the position and angle of use of the harmonic filter body. After the adjustment is completed, the fixed locking bolt is inserted between the rotating support seat and the fixed plate to lock the rotating support seat and the fixed plate so that the harmonic filter body is locked and fixed. In addition, threaded holes are evenly provided on the rotating support seat and the fixed plate, so that the rotating support seat can be fixed after any specified angle is rotated. The harmonic filter body is easy to install and use, and can be adjusted and fixed at any angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] Figure 1This is a schematic diagram of the three-dimensional structure of the main body of the present invention from the front perspective;

[0020] Figure 2 This is a schematic diagram of the main body split state structure in the present invention;

[0021] Figure 3 Schematic diagram of the auxiliary support adjustment part structure in the present invention;

[0022] Figure 4 Schematic diagram of the internal structure of the outer frame cover in the present invention;

[0023] Figure 5 This is a schematic diagram of the front end structure of the outer frame cover in the present invention;

[0024] Figure 6 Schematic diagram of the outer frame cover structure in the present invention;

[0025] Figure 7 Schematic diagram of the external structure of the position limiting support frame in the present invention;

[0026] Figure 8 This is a schematic diagram of the modular installation structure of the present invention;

[0027] Figure 9 This is a schematic diagram of the modular installation part in the present invention in a disassembled state;

[0028] Figure 10 Schematic diagram of the structure of the shielding protection device in the present invention;

[0029] Figure 11 This is a schematic diagram of the shielding protection device in the present invention in operation state;

[0030] Figure 12 It is a schematic diagram of the bottom structure of the shielding protection device in the present invention.

[0031] In the figure: 1. Connecting end; 2. First sealing connecting plate; 3. Sealing protective cover; 4. Harmonic filter body; 5. Outer frame cover; 6. Second sealing connecting plate; 7. Auxiliary support adjustment portion; 8. Threaded hole; 9. Fixed connecting plate; 10. Fixed mounting hole; 11. Rotating support seat; 12. Fixed plate; 13. Fixed locking bolt; 14. Modular mounting portion; 15. Limit support frame; 16. First sliding limit card slot; 17. Mounting slot; 18. Second sliding limit card slot; 19. Sliding drive tooth plate; 20. Limit adjustment card plate; 21. Third sliding limit card slot; 22. Fixed mounting plate; 23. First sliding outer frame; 24. Fixed threaded hole; 25. Fixed threaded column; 26. Sliding mounting frame; 27. Mounting support plate; 28. Mounting hole; 29. Cooling fan; 30. Sliding adjustment bracket; 31. Drive control gear; 32. Positioning mounting vertical plate; 33. Motor; 34. Electric adjustment push rod; 35. Second sliding outer frame; 36. Docking connection bracket; 37. Connecting plug; 38. Electric push rod; 39. First rotating shielding cover; 40. Second rotating shielding cover; 41. Drive motor; 42. Drive adjustment gear; 43. Track support plate; 44. Mounting platform; 45. First rotating adjustment gear ring; 46. Second rotating adjustment gear ring. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figure 1-Figure 2 and Figure 3-Figure 7 As shown, a harmonic filter for improving power quality of the present invention includes a harmonic filter body 4, and the two ends of the outer frame cover 5 in the harmonic filter body 4 are fixedly connected with a first sealing connecting plate 2 and a second sealing connecting plate 6 by bolts respectively. The side ends of the first sealing connecting plate 2 facing away from the outer frame cover 5 are evenly fixed with connecting ends 1, and the outer frame cover 5 is fixedly installed with sealing protective covers 3 on both sides of one end close to the connecting end 1 by bolts. A limiting support frame 15 is fixedly installed inside the outer frame cover 5 by bolts, and modular mounting parts 14 are symmetrically provided on the limiting support frame 15. Mounting grooves 17 are opened through both sides of the front end of the outer frame cover 5, and first sliding limiting card grooves 16 are opened on both sides of the mounting groove 17. Second sliding limiting card grooves 18 are opened in the middle and on both sides of the limiting support frame 15. The second sliding limiting card grooves 18 are provided to play a role of limiting sliding adjustment, and the provided limiting support frame 15 plays a role of supporting and limiting.

[0035] like Figure 8-9 As shown, the modular mounting portion 14 includes a sliding drive tooth plate 19, a limit adjustment card plate 20, a third sliding limit card slot 21, a fixed mounting plate 22, a first sliding outer frame 23, a fixed threaded hole 24, a fixed threaded column 25, a sliding mounting bracket 26, a mounting hole 28 and a second sliding outer frame 35. The first sliding outer frame 23 and the second sliding outer frame 35 are symmetrically distributed. The limit adjustment card plate 20 is provided inside the first sliding outer frame 23 and the second sliding outer frame 35. The upper ends of both sides of the limit adjustment card plate 20 are fixedly installed with a fixed mounting plate 22, and the fixed mounting plate 22 is fixedly mounted on the first sliding outer frame 23 by bolts. On the sliding outer frame 23, the fixed threaded holes 24 are evenly opened on the limit adjustment card plate 20, the third sliding limit card slot 21 is evenly opened on the limit adjustment card plate 20, and the two sides of the sliding mounting frame 26 are slidingly clamped on the third sliding limit card slot 21. The mounting holes 28 are evenly penetrated and opened on the sliding mounting frame 26. The fixed threaded columns 25 are threaded and inserted on both sides of the sliding mounting frame 26, and the fixed threaded columns 25 are adapted to the fixed threaded holes 24. The sliding drive gear plates 19 are symmetrically fixed on the inner side of the upper ends of the first sliding outer frame 23 and the second sliding outer frame 35 by bolts. Each frame is correspondingly provided with 2 drive gear plates 19. The bottom ends of the first sliding outer frame 23 and the second sliding outer frame 35 are both fixedly installed with mounting support plates 27, and cooling fans 29 are evenly fixedly installed on the mounting support plates 27, and the cooling fans 29 are located directly below the sliding mounting frame 26. The rotating driving control gear 31 can make the first sliding outer frame 23 or the second sliding outer frame 35 at the corresponding position slide outward along the second sliding limit slot 18 through the sliding driving tooth plate 19. Starting the electric adjustment push rod 34 can make the sliding adjustment frame 30 slide horizontally along the inside of the first sliding limit slot 16, thereby adjusting and controlling the driving control gear 31 to move to the sliding driving tooth plate 19 connected to the first sliding outer frame 23 or the second sliding outer frame 35, so that the first sliding outer frame 23 or the second sliding outer frame 35 can be accurately adjusted and controlled to connect the modules and components installed thereon to slide outward from the inside of the outer frame cover 5 separately.

[0036] A sliding adjustment bracket 30 is provided above the second sliding outer frame 35, and a limited mounting vertical plate 32 is fixedly installed at the bottom of both ends of the sliding adjustment bracket 30, and a driving control gear 31 is symmetrically installed between the limited mounting vertical plates 32. An electric adjustment push rod 34 is provided above the sliding adjustment bracket 30, and the front end of the electric adjustment push rod 34 is fixedly connected to the middle part of the sliding adjustment bracket 30, and a motor 33 is fixedly installed on the limited mounting vertical plate 32 located on the outside, and the driving end of the motor 33 is fixedly connected to the middle part of the driving control gear 31, the inner side of the end of the first sliding outer frame 23 is evenly fixedly installed with a docking connection column 36, and the inner side of the end of the second sliding outer frame 35 is evenly fixedly installed with an electric push rod 38, and the front end of the electric push rod 38 is fixedly connected with a connecting plug 37, and the connecting The connecting plug 37 is adapted to the card hole provided on the docking connection column 36, and the electric push rods 38 evenly provided on the second sliding outer frame 35 are started to control the connecting plug 37 to move forward and extend and insert into the interior of the docking connection column 36. At this time, no matter whether the driving control gear 31 is located on the sliding driving tooth plate 19 provided on the first sliding outer frame 23 or the second sliding outer frame 35, as long as the motor 33 is started to drive the driving control gear 31 to rotate, the first sliding outer frame 23 or the second sliding outer frame 35 can be synchronously slid outward and discharged; that is, each frame can be controlled to slide and discharge individually, or the two frames can be controlled to slide and discharge outward at the same time, thereby realizing rapid discharge, maintenance or installation and disassembly according to different maintenance conditions, and avoiding the problem of complete dismantling due to failure;.

[0037] The first sliding outer frame 23 and the second sliding outer frame 35 are slidably engaged with the second sliding limit slot 18 , both sides of the sliding adjustment bracket 30 are slidably engaged with the inside of the first sliding limit slot 16 , and the electric adjustment push rod 34 is fixedly installed inside the mounting slot 17 .

[0038] The two driving control gears 31 are meshed and connected with the sliding driving gear plate 19 of the corresponding frame. The sliding adjustment bracket 30, the driving control gear 31 and the electric adjustment push rod 34 are all located inside the sealing protective cover 3, and the sealing protective cover 3 plays a role of sealing protection.

[0039] The working principle of embodiment 1 is as follows: after the first sealing connecting plate 2 is removed, two first sliding outer frames 23 and a second sliding outer frame 35 are set inside the outer frame cover 5, so that four sliding outer frames for installing modules and parts are set inside the outer frame cover 5. During use, the four sliding outer frames can be individually slid outward from the inside of the outer frame cover 5, which is convenient for installing, disassembling and repairing modules or parts inside each sliding outer frame. The motor 33 set at the corresponding position is started, and the driving control gear 31 can be driven to rotate by the motor 33. The rotating driving control gear 31 is driven by the sliding By driving the toothed plate 19, the first sliding outer frame 23 or the second sliding outer frame 35 at the corresponding position can be slid outward along the second sliding limit card slot 18. Starting the electric adjustment push rod 34 can make the sliding adjustment card frame 30 slide laterally along the inside of the first sliding limit card slot 16, thereby adjusting and controlling the driving control gear 31 to move to the sliding driving toothed plate 19 connected to the first sliding outer frame 23 or the second sliding outer frame 35, so that the first sliding outer frame 23 or the second sliding outer frame 35 can be accurately adjusted and controlled to communicate with the modules and components installed thereon. The interior of the outer frame cover 5 slides outward and is discharged, and the electric push rods 38 evenly arranged on the second sliding outer frame 35 are started to control the connecting plug 37 to move forward and extend and insert into the interior of the docking connection column 36. At this time, no matter whether the driving control gear 31 is located on the sliding driving tooth plate 19 arranged on the first sliding outer frame 23 or the second sliding outer frame 35, as long as the motor 33 is started to drive the driving control gear 31 to rotate, the first sliding outer frame 23 or the second sliding outer frame 35 can be synchronously slid outward and discharged, that is, each frame can be controlled to slide and discharge independently, or the two frames can be controlled to slide and discharge simultaneously. The sliding adjustment bracket 30 can be discharged by sliding outward, realizing rapid discharge for maintenance or installation and disassembly according to different maintenance conditions, avoiding the problem of complete disassembly due to a fault; and a laser distance measuring sensor is fixedly provided at the front end of the sliding adjustment bracket 30 and inside the mounting groove 17. The laser distance measuring sensor can determine the distance moved and the position of the sliding adjustment bracket 30, thereby determining whether the driving control gear 31 is on the sliding driving tooth plate 19 provided on the first sliding outer frame 23 or the second sliding outer frame 35, and can accurately realize the outward sliding control of the first sliding outer frame 23 and the second sliding outer frame 35;

[0040] Cooling fans 29 are evenly arranged inside the first sliding outer frame 23 and the second sliding outer frame 35. The evenly arranged cooling fans 29 can perform real-time heat dissipation treatment on the modules or components installed inside the first sliding outer frame 23 or the second sliding outer frame 35, and according to the size of the modules and components, the sliding mounting frame 26 can be controlled and adjusted to rise and fall by screwing the fixing threaded column 25 and inserting it into the fixing threaded hole 24 at different positions, and the position of the sliding mounting frame 26 can be adjusted, so that modules or components of different sizes can be conveniently fixed and installed inside the first sliding outer frame 23 or the second sliding outer frame 35.

[0041] Example 2

[0042] On the basis of Example 1, Figure 1-3 As shown, an auxiliary support adjustment part 7 is provided in the middle of the bottom end of the outer frame cover 5, and the auxiliary support adjustment part 7 includes a threaded hole 8, a fixed connecting plate 9, a fixed mounting hole 10, a rotating support seat 11, a fixed plate 12 and a fixed locking bolt 13. The fixed mounting hole 10 is evenly opened through the edge of the fixed plate 12, and the middle part of the rotating support seat 11 is rotated and clamped in the middle part of the fixed plate 12. The fixed connecting plate 9 is fixedly connected to the middle part of the upper end of the rotating support seat 11. The threaded holes 8 are evenly opened on the fixed connecting plate 9, the rotating support seat 11 and the fixed plate 12. The fixed locking bolt 13 is threadedly inserted into the rotating support seat 11 and the fixed plate 12. The fixed connecting plate 9 is fixedly connected to the middle part of the bottom end of the outer frame cover 5 by bolts.

[0043] When implementing this embodiment, the fixed plate 12 can be fixedly set through the provided fixed mounting hole 10, so that the auxiliary support adjustment part 7 is fixedly set as a whole, so that the harmonic filter body 4 is fixed together with the auxiliary support adjustment part 7. When the harmonic filter body 4 is fixed and needs to be adjusted and controlled in the position and angle of use of the harmonic filter body 4, the fixed locking bolt 13 is adjusted and screwed so that the fixed locking bolt 13 is screwed out from the inside of the rotating support seat 11 and the fixed plate 12, so that the fixed connection plate 9 and the rotating support seat 11 can be rotated on the fixed plate 12 to adjust and control the position and angle of use of the harmonic filter body 4. After the adjustment is completed, the fixed locking bolt 13 is inserted between the rotating support seat 11 and the fixed plate 12 to lock the rotating support seat 11 and the fixed plate 12 so that the harmonic filter body 4 is locked and fixed. In addition, threaded holes 8 are evenly opened on the rotating support seat 11 and the fixed plate 12, so that the rotating support seat 11 can be fixed after rotating at any specified angle, so that the harmonic filter body 4 is easy to install and use, and can be adjusted and fixed at any angle.

[0044] Example 3

[0045] On the basis of Example 2, Figure 10-12 As shown, a shielding protection device is provided on the outside of the harmonic filter body 4, and the shielding protection device includes a first rotating shielding cover 39, a second rotating shielding cover 40, a driving motor 41, a driving adjustment gear 42, a track support plate 43, a mounting platform 44, a first rotating adjustment gear ring 45 and a second rotating adjustment gear ring 46. The mounting platform 44 is fixedly installed in the middle of the upper end of the track support plate 43, and the bottom ends of the first rotating adjustment gear ring 45 and the second rotating adjustment gear ring 46 are rotatably clamped on the track support plate 43, and the first rotating adjustment gear ring 45 is located outside the second rotating adjustment gear ring 46. The bottom end of the second rotating shielding cover 40 is fixedly connected to the outer side of the edge of the second rotating adjustment gear ring 46, and the bottom end of the first rotating shielding cover 39 is fixedly connected to the inner edge of the first rotating adjustment gear ring 45. The driving motor 41 is fixedly installed on the track support plate 43, and the two driving motors 41 are respectively engaged with the first rotating adjustment gear ring 45 and the second rotating adjustment gear ring 46.

[0046] When implementing this embodiment, the harmonic filter body can be mounted on the mounting platform 44 by being fixedly connected to the mounting platform 44 via the fixing plate 12. When external electromagnetic interference occurs during the use of the harmonic filter, the drive motor 41 is started to drive the drive adjustment gear 42 at the end to rotate, thereby driving the first rotating adjustment gear ring 45 and the second rotating adjustment gear ring 46 to rotate, so that the second rotating shield cover 40 retracted into the interior of the first rotating shield cover 39 is rotated to be exposed and rotated to be aligned with the first rotating shield cover 39 until the harmonic filter cover is protected inside the second rotating shield cover 40 and the first rotating shield cover 39. In addition, according to the direction and position of the external electromagnetic interference, the position and angle of the barrier protection of the first rotating shield cover 39 and the second rotating shield cover 40 can be adjusted and controlled, so that the external electromagnetic interference can be automatically controlled by controlling the operation of the drive motor 41, and the direction and position of the protection can be automatically adjusted, the overlap degree of the first rotating shield cover 39 and the second rotating shield cover 40 can be adjusted and controlled, and the level and intensity of the protection can be automatically adjusted and controlled.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A harmonic filter for improving power quality, comprising a harmonic filter body (4), characterized in that: The outer frame cover (5) in the harmonic filter body (4) is fixedly connected to a first sealing connection plate (2) and a second sealing connection plate (6) at both ends thereof by bolts, and a connection end (1) is evenly fixedly provided on the side end of the first sealing connection plate (2) facing away from the outer frame cover (5). A sealing protective cover (3) is fixedly installed on both sides of one end of the outer frame cover (5) close to the connection end (1) by bolts, and a limit support frame (15) is fixedly installed inside the outer frame cover (5) by bolts, and a modular mounting portion (14) is symmetrically provided on the limit support frame (15).

2. The harmonic filter for improving power quality according to claim 1, characterized in that: The front ends of the outer frame cover (5) are provided with mounting grooves (17) extending through both sides thereof, the mounting grooves (17) are provided with first sliding limit slots (16) on both sides thereof, and the middle portion and both sides of the limit support frame (15) are provided with second sliding limit slots (18).

3. The harmonic filter for improving power quality according to claim 2, characterized in that: The modular mounting portion (14) includes a sliding drive tooth plate (19), a limit adjustment card plate (20), a third sliding limit card slot (21), a fixed mounting plate (22), a first sliding outer frame (23), a fixed threaded hole (24), a fixed threaded column (25), a sliding mounting frame (26), a mounting hole (28) and a second sliding outer frame (35), wherein the first sliding outer frame (23) and the second sliding outer frame (35) are symmetrically distributed, and the first sliding outer frame (23) and the second sliding outer frame (35) are both provided with a limit adjustment card plate (20), and the upper ends of both sides of the limit adjustment card plate (20) are fixedly mounted with a fixed mounting plate (22), and the fixed mounting plate (22) is fixedly mounted on the first sliding outer frame (23) by bolts. 3), the fixed threaded holes (24) are evenly arranged on the limit adjustment card plate (20), the third sliding limit card slot (21) is evenly arranged on the limit adjustment card plate (20), the two sides of the sliding mounting frame (26) are slidingly connected to the third sliding limit card slot (21), the mounting holes (28) are evenly penetrated and opened on the sliding mounting frame (26), the fixed threaded columns (25) are threadedly inserted into the two sides of the sliding mounting frame (26), and the fixed threaded columns (25) are adapted to the fixed threaded holes (24), the sliding drive tooth plates (19) are symmetrically fixedly installed on the inner sides of the upper ends of the first sliding outer frame (23) and the second sliding outer frame (35) by bolts, and each frame is correspondingly provided with two drive tooth plates (19).

4. The harmonic filter for improving power quality according to claim 3, characterized in that: A mounting support plate (27) is fixedly mounted inside the bottom ends of the first sliding outer frame (23) and the second sliding outer frame (35), and a heat dissipation fan (29) is evenly fixedly mounted on the mounting support plate (27), and the heat dissipation fan (29) is located directly below the sliding mounting frame (26).

5. The harmonic filter for improving power quality according to claim 4, characterized in that: A sliding adjustment bracket (30) is provided above the second sliding outer frame (35), and limit mounting vertical plates (32) are fixedly installed at the bottoms of both ends of the sliding adjustment bracket (30), and a driving control gear (31) is symmetrically rotated and installed between the limit mounting vertical plates (32). An electric adjustment push rod (34) is provided above the sliding adjustment bracket (30), and the front end of the electric adjustment push rod (34) is fixedly connected to the middle of the sliding adjustment bracket (30), and a motor (33) is fixedly installed on the limit mounting vertical plate (32) arranged on the outside, and the driving end of the motor (33) is fixedly connected to the middle of the driving control gear (31).

6. The harmonic filter for improving power quality according to claim 5, characterized in that: A docking connection column (36) is evenly fixedly installed on the inner side of the end of the first sliding outer frame (23), and an electric push rod (38) is evenly fixedly installed on the inner side of the end of the second sliding outer frame (35). The front end of the electric push rod (38) is fixedly connected to a connection plug (37), and the connection plug (37) is adapted to the card hole provided on the docking connection column (36).

7. The harmonic filter for improving power quality according to claim 6, characterized in that: The first sliding outer frame (23) and the second sliding outer frame (35) are slidably engaged with the second sliding limit slot (18), the two sides of the sliding adjustment bracket (30) are slidably engaged with the inside of the first sliding limit slot (16), and the electric adjustment push rod (34) is fixedly installed in the inside of the installation slot (17).

8. The harmonic filter for improving power quality according to claim 7, characterized in that: The two driving control gears (31) are meshedly connected with the sliding driving tooth plate (19) of the corresponding frame, the sliding adjustment bracket (30), the driving control gear (31) and the electric adjustment push rod (34) are all located inside the sealing protective cover (3), and an auxiliary support adjustment portion (7) is provided at the middle of the bottom end of the outer frame cover (5).

9. The harmonic filter for improving power quality according to claim 8, characterized in that: The auxiliary support adjustment portion (7) includes a threaded hole (8), a fixed connection plate (9), a fixed installation hole (10), a rotating support seat (11), a fixed plate (12) and a fixed locking bolt (13); the fixed installation hole (10) is evenly opened through the edge of the fixed plate (12); the middle part of the rotating support seat (11) is rotatably clamped in the middle part of the fixed plate (12); the fixed connection plate (9) is fixedly connected to the middle part of the upper end of the rotating support seat (11); the threaded hole (8) is evenly opened on the fixed connection plate (9), the rotating support seat (11) and the fixed plate (12); the fixed locking bolt (13) is threadedly inserted into the rotating support seat (11) and the fixed plate (12); the fixed connection plate (9) is fixedly connected to the middle part of the bottom end of the outer frame cover (5) by bolts.

10. The harmonic filter for improving power quality according to claim 9, characterized in that: A shielding protection device is provided on the outside of the harmonic filter body (4), and the shielding protection device comprises a first rotating shielding cover (39), a second rotating shielding cover (40), a driving motor (41), a driving adjustment gear (42), a track support plate (43), a mounting platform (44), a first rotating adjustment gear ring (45) and a second rotating adjustment gear ring (46), wherein the mounting platform (44) is fixedly mounted on the middle part of the upper end of the track support plate (43), and the bottom ends of the first rotating adjustment gear ring (45) and the second rotating adjustment gear ring (46) are rotatably engaged with the track support plate (43). The track support plate (43) is provided with a first rotation adjustment tooth ring (45) and a second rotation adjustment tooth ring (46). The bottom end of the second rotation shielding cover (40) is fixedly connected to the outer edge of the second rotation adjustment tooth ring (46). The bottom end of the first rotation shielding cover (39) is fixedly connected to the inner edge of the first rotation adjustment tooth ring (45). The driving motor (41) is fixedly installed on the track support plate (43). The two driving motors (41) are respectively engaged with the first rotation adjustment tooth ring (45) and the second rotation adjustment tooth ring (46).

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