A filter dustproof device for high-voltage harmonic processing

Abstract

The utility model provides a filter dustproof device for high pressure harmonic processing relates to filter dustproof technical field, including dust screen frame, one end fixed mounting of dust screen frame is oscillation dust screen, the one side of oscillation dust screen is provided with the oscillation cam pole of driving it. The utility model has the advantages of: the oscillation dust screen that can oscillate is arranged on the outside of dust screen frame of filter two sides, oscillation cam pole that carries out periodic drive to oscillation dust screen is arranged in the inside of dust screen frame, drives oscillation dust screen to carry out high frequency oscillation operation with oscillation cam pole, the dust that accumulates in the inside of oscillation dust screen is vibrated down with the kinetic energy generated by oscillation, realizes the cleaning of dustproof structure, and the dislocation distribution of dustproof position of dust screen frame and oscillation dust screen is used to realize double dustproof protection, further enhances the dustproof effect of dustproof structure, realizes the self -cleaning of dustproof structure, improves the convenience of dustproof structure use.

Description

Technical Field

[0001] This utility model relates to the field of filter dust prevention technology, and in particular to a filter dust prevention device for high voltage harmonic processing. Background Technology

[0002] In power systems, high-voltage harmonics are periodic interference signals generated by nonlinear loads such as converters and electric arc furnaces, which can lead to equipment overheating, metering errors, and even insulation damage. High-voltage harmonic suppression filters, through the synergistic effect of capacitive and inductive reactance, create a low-impedance path for specific frequency harmonics, thus suppressing them and are key equipment for ensuring the stable operation of high-voltage power grids. As a supporting protective component, the filter's dustproof device, through sealing and filtration structural designs, prevents external dust, moisture, and impurities from entering the filter's interior, avoiding decreased heat dissipation efficiency or deterioration of insulation performance due to contaminant adhesion.

[0003] However, existing filter dustproof devices are not easy to self-clean during use. After long-term use, dust easily accumulates inside the dustproof structure, causing blockage, reducing ventilation, affecting filter heat dissipation, and requiring frequent replacement and cleaning. Utility Model Content

[0004] Therefore, the purpose of this utility model is to propose a dustproof device for a high-voltage harmonic processing filter, so as to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, one embodiment of this utility model provides a dustproof device for a high-voltage harmonic processing filter, comprising a filter for processing the high-voltage harmonic content in the power grid. The filter has a heat dissipation slot at its side for ventilation and heat dissipation. Inside the heat dissipation slot is a dustproof mesh frame for protecting the filter's interior. One end of the dustproof mesh frame is fixedly fitted with an offset dustproof mesh. An oscillating cam rod is provided on one side of the oscillating dustproof mesh to drive it. The oscillating cam rod is signal-connected to a microcontroller unit for signal processing and automated control. The microcontroller unit has a signal interface connected to the filter's internal control system, which controls and powers it, ensuring the integration of the dustproof device and the filter. The microcontroller unit is signal-connected to a ventilation volume detection tube assembly for detecting the ventilation volume on one side of the dustproof mesh frame. Inside the oscillating dustproof mesh is a reciprocating scraper frame. A scraper blade for cleaning the surface of the oscillating dustproof mesh is fixedly installed in the middle of the scraper frame. Shock-absorbing pads are provided at both ends of the scraper blade to protect it from vibration.

[0006] Preferably, in any of the above embodiments, the dustproof mesh frame includes a supporting dustproof frame and a protective mesh for filtering dust. The dustproof frame is fixedly installed inside the heat dissipation slot of the filter by screws. The protective mesh is fixedly installed inside the dustproof frame. The protective mesh has a plurality of linear array dustproof filter holes inside. One end of the dustproof frame is provided with a support guide platform located on one side of the protective mesh.

[0007] The above technical solution involves fixing the dustproof frame (Q235 steel) to the heat dissipation slots of the filter with screws (providing preload) to form a rigid support frame. The protective mesh (stainless steel wire mesh) is fixed inside the dustproof frame, and its linear array of filter holes can intercept dust particles of a specified size, initially preventing contaminants from entering the filter. A support guide platform at one end of the dustproof frame provides an installation reference for the vibrating dustproof mesh, ensuring the stability of the vibrating structure's movement.

[0008] Preferably, in any of the above embodiments, the vibrating dustproof net includes a supporting vibrating spring, a movable filter plate for dust protection, and a guiding rod for guidance. The vibrating spring is fixedly installed inside the dustproof frame support guide platform. One end of the vibrating spring is fixedly installed with a movable filter plate that moves inside the dustproof frame. One end of the movable filter plate is fixedly installed with a guiding rod that passes through the vibrating spring and the support guide platform.

[0009] The above technical solution is adopted: the oscillating spring is fixed to the support guide table, and its elasticity makes the movable filter plate (aluminum alloy material) fit against the guide table in normal state. The filter holes on the surface of the movable filter plate are misaligned with the filter holes of the protective net to form a double barrier (improving the overall interception rate). The movable guide rod passes through the oscillating spring and the guide table, restricting the lateral displacement of the movable filter plate and ensuring that it oscillates along the axis. During oscillation, the dust attached to the filter plate is removed from the surface due to inertia.

[0010] Preferably, in any of the above embodiments, the oscillating cam rod includes a drive motor connected to the microcontroller unit and a protruding rod that drives the movable filter plate. The drive motor is fixedly installed inside the dustproof frame, and the output end of the drive motor is fixedly installed with a protruding rod that rotates inside the dustproof frame.

[0011] The above technical solution involves a drive motor (DC motor) that is started by a microcontroller unit. Its output drives a convex rod (made of nylon) to rotate. As the convex rod rotates, it periodically pushes the movable filter plate. Combined with the restoring force of the oscillating spring, this causes the movable filter plate to oscillate at a high frequency. The microcontroller unit controls the start and stop of the motor based on the ventilation volume detection results (starting when the ventilation volume is below a threshold). The oscillation duration can be set to avoid ineffective energy consumption.

[0012] Preferably, in any of the above embodiments, the ventilation volume detection tube assembly includes a support ventilation cylinder and a ventilation pressure sensor for detecting ventilation volume. The ventilation cylinder is fixedly installed in the middle of one side of the protective net, and a ventilation pressure sensor connected to the microcontroller unit is fixedly installed inside the ventilation cylinder.

[0013] The above technical solution is adopted: the ventilation duct (PVC material) is fixed to one side of the protective net, and its two ends are connected to the airflow above and below the filter. The ventilation pressure sensor detects the pressure difference inside the ventilation duct and converts it into ventilation volume through the micro-control unit (the pressure difference and ventilation volume are linearly related). When the detected value is lower than the preset threshold (which can be adjusted by the filter control system), the micro-control unit triggers the oscillating cam rod to start the dust cleaning, realizing intelligent control.

[0014] Preferably, in any of the above embodiments, the scraper frame is movably connected to the interior of the movable filter plate, and smooth balls located inside the movable filter plate are provided at both ends of the scraper frame. The smooth balls are in contact with the movable filter plate, and the scraper is in contact with the end face of the movable filter plate.

[0015] The above technical solution involves a scraper frame (ABS material) that is slidably connected to the inner wall of the movable filter plate via smooth ball bearings at both ends. When the movable filter plate vibrates, the scraper frame moves synchronously with it due to inertia, and the free rolling of the ball bearings causes a small relative displacement. The scraper (polyurethane material) adheres to the surface of the movable filter plate and scrapes away residual dust as the scraper frame moves, especially removing adhering dust (such as oil-stain mixture) that has not been dislodged during vibration.

[0016] Preferably, in any of the above embodiments, the end faces of the shock-absorbing rubber pad and the movable filter plate are fitted together, and the shock-absorbing rubber pad is fixedly installed in the middle of the scraper frame.

[0017] The above technical solution is adopted: the shock-absorbing rubber pad (nitrile rubber) is fixed in the middle of the scraper frame and fits tightly against the end face of the movable filter plate. When the movable filter plate vibrates at high frequency, the rubber pad absorbs the impact energy between the scraper frame and the filter plate through elastic deformation, avoiding wear of the scraper due to rigid collision, and reducing vibration noise.

[0018] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: 1. An oscillating dustproof net is installed on the outer side of the dustproof net frame on both sides of the filter. At the same time, an oscillating cam rod is installed inside the dustproof net frame to periodically drive the oscillating dustproof net. The oscillating cam rod drives the oscillating dustproof net to oscillate at high frequency. The kinetic energy generated by the oscillation shakes down the dust accumulated inside the oscillating dustproof net, thereby cleaning the dustproof structure. At the same time, the staggered distribution of the dustproof net frame and the oscillating dustproof net provides double dustproof protection, further enhancing the dustproof effect of the dustproof structure, realizing the self-cleaning of the dustproof structure, and improving the convenience of use of the dustproof structure.

[0019] 2. A movable scraper frame is installed inside the vibrating dustproof net. The kinetic energy generated by the vibration of the vibrating dustproof net forces the scraper frame to move randomly inside the net. The movement of the scraper frame drives the scraper blade to scrape and clean the surface of the vibrating dustproof net, further improving the cleaning efficiency of the dustproof structure. At the same time, the shock-absorbing pads on both sides of the scraper blade provide a certain degree of protection, reducing the damage to the scraper blade caused by the vibrating dustproof net and ensuring the service life of the scraper blade.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure according to an embodiment of the present utility model; Figure 2 This is a partial structural schematic diagram according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the scraper frame according to an embodiment of the present utility model; Figure 4 This is a cross-sectional structural diagram of the dustproof mesh frame according to an embodiment of the present utility model; Among them: 1-Filter, 2-Dustproof mesh frame, 21-Dustproof frame, 22-Protective mesh, 3-Vibrating dustproof mesh, 31-Vibrating spring, 32-Modible filter plate, 33-Modible guide rod, 4-Vibrating cam rod, 41-Drive motor, 42-Protruding rod, 5-Ventilation volume detection tube assembly, 51-Ventilation cylinder, 52-Ventilation pressure sensor, 6-Scraper frame, 7-Scraper blade, 8-Shock-absorbing rubber pad. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0023] like Figure 1-4As shown in the figure, a dustproof device for a high-voltage harmonic processing filter according to an embodiment of the present invention includes a filter 1 for processing the high-voltage harmonic content in the power grid. The filter 1 has a heat dissipation slot for ventilation and heat dissipation on its side. A dustproof mesh frame 2 for protecting the interior of the filter 1 is set inside the heat dissipation slot. An oscillating dustproof mesh 3 for dust prevention is fixedly installed at one end of the dustproof mesh frame 2. An oscillating cam rod 4 for driving the oscillating dustproof mesh 3 is set on one side. The oscillating cam rod 4 is connected to a microcontroller unit for signal processing and automatic control. The microcontroller unit is provided with a signal interface and is connected to the control system inside the filter 1. The control system built into the filter 1 controls and powers the microcontroller unit to ensure the integration of the dustproof device and the filter 1. The microcontroller unit is connected to a ventilation volume detection tube group 5 for detecting the ventilation volume on one side of the dustproof mesh frame 2. A scraper frame 6 for reciprocating movement is set inside the oscillating dustproof mesh 3. A scraper 7 for cleaning the surface of the oscillating dustproof mesh 3 is fixedly installed in the middle of the scraper frame 6. Shock-absorbing rubber pads 8 for vibration protection are set at both ends of the scraper 7.

[0024] Preferably, the dustproof mesh frame 2 includes a dustproof frame 21 for support and a protective mesh 22 for filtering dust. The dustproof frame 21 is fixedly installed inside the heat dissipation slot of the filter 1 by screws. The protective mesh 22 is fixedly installed inside the dustproof frame 21. The protective mesh 22 has a plurality of linear array dustproof filter holes inside. A support guide platform is provided at one end of the dustproof frame 21 on one side of the protective mesh 22.

[0025] The above technical solution is adopted as follows: the dustproof frame 21 (Q235 steel) is fixed to the heat dissipation slot of the filter 1 by screws (providing pre-tightening force), forming a rigid support frame. The protective mesh 22 (stainless steel wire mesh) is fixed inside the dustproof frame. Its linear array of filter holes can intercept dust of a specified particle size, initially blocking contaminants from entering the filter. The support guide platform at one end of the dustproof frame provides an installation reference for the vibrating dustproof mesh 3, ensuring the stability of the vibrating structure.

[0026] Preferably, the vibrating dustproof net 3 includes a supporting vibrating spring 31, a movable filter plate 32 for dust protection, and a guiding rod 33 for guidance. The vibrating spring 31 is fixedly installed inside the support guide platform of the dustproof frame 21. One end of the vibrating spring 31 is fixedly installed with the movable filter plate 32 that moves inside the dustproof frame 21. One end of the movable filter plate 32 is fixedly installed with the guiding rod 33 that passes through the vibrating spring 31 and the support guide platform.

[0027] The above technical solution is adopted: the oscillating spring 31 is fixed to the support guide table, and its elasticity makes the movable filter plate 32 (aluminum alloy material) fit against the guide table in normal state. The filter holes on the surface of the movable filter plate are misaligned with the filter holes of the protective net 22 to form a double barrier (improving the overall interception rate). The movable guide rod 33 passes through the oscillating spring and the guide table, restricts the lateral displacement of the movable filter plate, and ensures that it oscillates along the axial direction. During oscillation, the dust attached to the filter plate is removed from the surface due to inertia.

[0028] Preferably, in any of the above schemes, the oscillating cam rod 4 includes a drive motor 41 connected to the microcontroller unit and a protruding rod 42 that drives the movable filter plate 32. The drive motor 41 is fixedly installed inside the dustproof frame 21, and the output end of the drive motor 41 is fixedly installed with the protruding rod 42 that rotates inside the dustproof frame 21.

[0029] The above technical solution involves a drive motor 41 (DC motor) that is started by a microcontroller unit. Its output drives a protruding rod 42 (made of nylon) to rotate. As the protruding rod rotates, it periodically pushes the movable filter plate 32. Combined with the restoring force of the oscillating spring 31, this causes the movable filter plate to oscillate at high frequency. The microcontroller unit controls the motor's start and stop based on the ventilation volume detection results (starting when the ventilation volume is below a threshold). The oscillation duration can be set to avoid ineffective energy consumption.

[0030] Preferably, the ventilation volume detection tube assembly 5 includes a ventilation cylinder 51 for support and a ventilation pressure sensor 52 for detecting ventilation volume. The ventilation cylinder 51 is fixedly installed in the middle of one side of the protective net 22, and the ventilation pressure sensor 52, which is connected to the microcontroller unit, is fixedly installed inside the ventilation cylinder 51.

[0031] The above technical solution is adopted: the ventilation duct 51 (PVC material) is fixed to one side of the protective net 22, and its two ends are connected to the airflow above and below the filter. The ventilation pressure sensor 52 detects the pressure difference inside the ventilation duct and converts it into ventilation volume through the micro-control unit (the pressure difference and ventilation volume are linearly related). When the detected value is lower than the preset threshold (which can be adjusted by the filter control system), the micro-control unit triggers the oscillating cam rod 4 to start dust cleaning, so as to realize intelligent control.

[0032] Preferably, in any of the above solutions, the scraper frame 6 is movably connected to the interior of the movable filter plate 32, and smooth balls are provided at both ends of the scraper frame 6 inside the movable filter plate 32. The smooth balls are in contact with the movable filter plate 32, and the scraper 7 is in contact with the end face of the movable filter plate 32.

[0033] The above technical solution is adopted as follows: The scraper frame 6 (ABS material) is slidably connected to the inner wall of the movable filter plate 32 through smooth ball bearings at both ends. When the movable filter plate vibrates, the scraper frame moves synchronously with it due to inertia, and a small relative displacement is generated due to the free rolling of the ball bearings. The scraper 7 (polyurethane material) is attached to the surface of the movable filter plate and scrapes away residual dust with the movement of the scraper frame, especially removing the adhering dust (such as oil-stain mixture dust) that has not been dislodged during vibration.

[0034] Preferably, in any of the above schemes, the end faces of the shock-absorbing pad 8 and the movable filter plate 32 are fitted together, and the shock-absorbing pad 8 is fixedly installed in the middle of the scraper frame 6.

[0035] The above technical solution is adopted: the shock-absorbing pad 8 (nitrile rubber) is fixed in the middle of the scraper frame 6 and is tightly attached to the end face of the movable filter plate 32. When the movable filter plate vibrates at high frequency, the pad absorbs the impact energy between the scraper frame and the filter plate through elastic deformation, so as to avoid the scraper 7 from being worn due to rigid collision, and at the same time reduce vibration noise.

[0036] The working principle of the dustproof device for high-voltage harmonic processing filter of this utility model is as follows: The dustproof mesh frame 2 of the heat dissipation slot of filter 1 is fixed with the protective mesh 22 by the dustproof frame 21, which initially filters dust. In the oscillating dustproof mesh 3 supported by the dustproof frame 21, the oscillating spring 31, the movable filter plate 32 and the movable guide rod 33 cooperate and are misaligned with the protective mesh 22 to form a double dustproof. The ventilation pressure sensor 52 in the ventilation tube 51 of the ventilation volume detection tube group 5 detects the ventilation volume and transmits the signal to the microcontroller unit. The microcontroller unit controls the drive motor 41 of the oscillating cam rod 4 to drive the convex rod 42 to drive the movable filter plate 32 to oscillate. During oscillation, the scraper frame 6 moves in the movable filter plate 32, which drives the scraper 7 to clean the surface. The shock-absorbing rubber pad 8 reduces the wear of the scraper 7 and realizes dust prevention and self-cleaning.

[0037] Compared with the prior art, the present invention has the following advantages: 1. An oscillating dustproof net 3 is installed on the outer side of the dustproof net frame 2 on both sides of the filter 1. At the same time, an oscillating cam rod 4 is installed inside the dustproof net frame 2 to periodically drive the oscillating dustproof net 3. The oscillating cam rod 4 drives the oscillating dustproof net 3 to oscillate at high frequency. The kinetic energy generated by the oscillation shakes down the dust accumulated inside the oscillating dustproof net 3, thereby cleaning the dustproof structure. At the same time, the staggered distribution of the dustproof net frame 2 and the oscillating dustproof net 3 achieves double dustproof protection, further enhancing the dustproof effect of the dustproof structure, realizing the self-cleaning of the dustproof structure, and improving the convenience of using the dustproof structure.

[0038] 2. A movable scraper frame 6 is installed inside the vibrating dustproof net 3. The kinetic energy generated by the vibration of the vibrating dustproof net 3 forces the scraper frame 6 to move randomly inside the vibrating dustproof net 3. The movement of the scraper frame 6 drives the scraper 7 to scrape and clean the surface of the vibrating dustproof net 3, further improving the cleaning efficiency of the dustproof structure. At the same time, the shock-absorbing rubber pads 8 on both sides of the scraper 7 provide a certain degree of protection for the scraper 7, reducing the damage to the scraper 7 caused by the vibrating dustproof net 3 and ensuring the service life of the scraper 7.

Claims

1. A dustproof device for a high-voltage harmonic processing filter, comprising a filter (1) for processing the high-voltage harmonic content in the power grid, wherein the filter (1) has a heat dissipation slot for ventilation and heat dissipation at its side end, and a dustproof mesh frame (2) for protecting the interior of the filter (1) is provided inside the heat dissipation slot, characterized in that: One end of the dustproof net frame (2) is fixedly installed with an oscillating dustproof net (3) that is offset from it for dust prevention. An oscillating cam rod (4) is provided on one side of the oscillating dustproof net (3) to drive it. The oscillating cam rod (4) is connected to a micro-control unit for signal processing and automatic control. The micro-control unit is connected to a ventilation volume detection tube group (5) to detect the ventilation volume on one side of the dustproof net frame (2). The inside of the oscillating dustproof net (3) is provided with a scraper frame (6) that moves back and forth. Scrapers (7) for cleaning the surface of the oscillating dustproof net (3) are fixedly installed at both ends of the middle part of the scraper frame (6). Several shock-absorbing rubber pads (8) are provided between the two scrapers (7) to protect it from vibration.

2. The dustproof device for a high-voltage harmonic processing filter as described in claim 1, characterized in that: The dustproof mesh frame (2) includes a dustproof frame (21) for support and a protective mesh (22) for filtering dust. The dustproof frame (21) is fixedly installed inside the heat dissipation slot of the filter (1) by screws. The protective mesh (22) is fixedly installed inside the dustproof frame (21). The protective mesh (22) has a number of linear array dustproof filter holes inside. One end of the dustproof frame (21) is provided with a support guide platform located on one side of the protective mesh (22).

3. The dustproof device for a high-voltage harmonic processing filter as described in claim 2, characterized in that: The vibrating dustproof net (3) includes a supporting vibrating spring (31), a movable filter plate (32) for dust protection, and a movable guide rod (33) for guidance. The vibrating spring (31) is fixedly installed inside the support guide platform of the dustproof frame (21). One end of the vibrating spring (31) is fixedly installed with the movable filter plate (32) that moves inside the dustproof frame (21). One end of the movable filter plate (32) is fixedly installed with the movable guide rod (33) that passes through the vibrating spring (31) and the support guide platform.

4. The dustproof device for a high-voltage harmonic processing filter as described in claim 3, characterized in that: The oscillating cam rod (4) includes a drive motor (41) connected to the microcontroller unit and a protruding rod (42) that drives the movable filter plate (32). The drive motor (41) is fixedly installed inside the dustproof frame (21), and the output end of the drive motor (41) is fixedly installed with a protruding rod (42) that rotates inside the dustproof frame (21).

5. The dustproof device for a high-voltage harmonic processing filter as described in claim 4, characterized in that: The ventilation volume detection tube assembly (5) includes a ventilation cylinder (51) for support and a ventilation pressure sensor (52) for ventilation volume detection. The ventilation cylinder (51) is fixedly installed in the middle of one side of the protective net (22). The ventilation pressure sensor (52) connected to the micro-control unit is fixedly installed inside the ventilation cylinder (51).

6. The dustproof device for a high-voltage harmonic processing filter as described in claim 5, characterized in that: The scraper frame (6) is movably connected to the interior of the movable filter plate (32). Smooth balls located inside the movable filter plate (32) are provided at both ends of the scraper frame (6). The smooth balls are in contact with the movable filter plate (32), and the scraper (7) is in contact with the end face of the movable filter plate (32).

7. The dustproof device for a high-voltage harmonic processing filter as described in claim 6, characterized in that: The end faces of the shock-absorbing rubber pad (8) and the movable filter plate (32) are attached together, and the shock-absorbing rubber pad (8) is fixedly installed in the middle of the scraper frame (6).

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