Harmonic filtering device of high-voltage frequency converter

Abstract

The utility model relates to the field of harmonic filtering devices, in particular to a harmonic filtering device of a high-voltage frequency converter. Comprising a frame, a control interface is arranged on the surface of the frame, a plurality of filter modules are installed in the frame, an adjusting structure is arranged at the position, corresponding to the filter modules, of one side of the inner wall of the frame, the adjusting structure comprises a plurality of fixing plates, the fixing plates are fixedly connected with the frame, and supporting frames are fixedly connected to the surfaces of the fixing plates; the side, away from the fixing plate, of the supporting frame is rotationally connected with a connecting block, the side, away from the supporting frame, of the connecting block is fixedly connected with a supporting plate, and the side, close to the supporting frame, of the fixing plate is fixedly connected with a magnetic block. The harmonic filtering device of the high-voltage frequency converter provided by the utility model has the advantages that the supporting plate can be conveniently stored and unfolded, the supporting plate and the pressing plate are used for bunching and arranging a plurality of connecting wires on the filter module, the time for subsequently arranging the connecting wires is shortened, the working efficiency of maintenance operation is improved, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the field of harmonic filtering devices, in particular to a harmonic filtering device for a high-voltage frequency converter. Background Art

[0002] The harmonic filter device is a new type of special equipment for power harmonic control. It is composed of a frame, a control interface, a filter module, a door panel, and a heat dissipation device. It can eliminate the interference caused by harmonics during the operation of electrical equipment and power grids.

[0003] In the prior art, when using a high-voltage inverter to adjust and control the power frequency, the high-frequency noise and electromagnetic interference generated by the high-voltage inverter will interfere with the device itself and the surrounding electrical equipment, affecting the system stability. A harmonic filtering device is used to generate a compensation current with the same amplitude and opposite polarity as the harmonic current of the power grid and inject it into the power grid to compensate or offset the harmonic current, which can effectively eliminate the interference generated by the high-voltage inverter. However, this harmonic filtering device will have the following problems during use: the filter module in the device needs to connect several cables, and several cables are prone to intertwining, resulting in a lot of time spent on arranging the cables during subsequent maintenance work, reducing the work efficiency of the maintenance work. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art that a plurality of cables are intertwined and entangled inside the device, resulting in low efficiency of subsequent maintenance operations.

[0005] In order to solve the above technical problems, the utility model provides a high-voltage inverter harmonic filtering device, comprising: a frame, a control interface is provided on the surface of the frame, a plurality of filter modules are installed inside the frame, a door panel is rotatably connected to one side of the frame, a maintenance door is rotatably connected to the side of the frame away from the door panel, a cooling fan is installed on the surface of the maintenance door, an adjustment structure is provided at a position corresponding to the filter module on one side of the inner wall of the frame, the adjustment structure comprises a plurality of fixing plates, a plurality of the fixing plates are fixedly connected to the frame, a support frame is fixedly connected to the surface of the fixing plate, a connecting block is rotatably connected to the side of the support frame away from the fixing plate, The connecting block is fixedly connected to a support plate on a side away from the support frame, and the fixing plate is fixedly connected to a magnetic block on a side close to the support frame, and an iron sheet is fixedly connected to a position of the support plate corresponding to the magnetic block, and the iron sheet is attracted to the magnetic block, and the support plate is fixedly connected to a fixing rod at one end away from the connecting block, and the arc surface of the fixing rod is rotatably connected to a ring, and the ring is rotatably connected to the inner wall of the support plate, and the arc surface of the fixing rod is movably connected to a pressure plate, and the arc surface of the fixing rod is sleeved with a spring, and two ends of the spring are respectively fixedly connected to the ring and the pressure plate, and the side of the support plate close to the pressure plate is fixedly connected to a limiting rod, and the arc surface of the limiting rod is slidably connected to the pressure plate.

[0006] The effects achieved by the above components are: the support plate can be easily stored and opened, and the support plate and the pressure plate are used to bundle the multiple connecting wires on the filter module, thereby reducing the time for subsequent arranging of the connecting wires, improving the work efficiency of maintenance operations, and being highly practical.

[0007] Preferably, a plurality of arc grooves are provided on the side where the support plate and the pressure plate are close to each other, and the plurality of arc grooves are evenly distributed on the support plate and the pressure plate.

[0008] The effect achieved by the above components is that the arc groove enables the pressure plate and the support plate to better store and limit the connection wires on the filter module.

[0009] Preferably, a handle is fixedly connected to a side of the pressing plate away from the supporting plate, and the cross-section of the handle is "U"-shaped.

[0010] The effect achieved by the above components is: the pressing plate is driven to move by operating the handle, making it convenient for the user to operate the pressing plate.

[0011] Preferably, one end of the limiting rod close to the pressure plate is in an arc shape.

[0012] The effect achieved by the above components is: it is convenient for the limit rod to slide into the pressure plate.

[0013] Preferably, an auxiliary structure is provided on one side of the inspection door at a position corresponding to the heat dissipation fan, the auxiliary structure includes a fixed frame, the fixed frame is fixedly connected to the inspection door, the inner wall of the fixed frame is slidably connected to a dust filter frame, the inner wall of the fixed frame is slidably connected to a drying box, a desiccant is arranged inside the drying box, an auxiliary rod is threadedly inserted on one side of the fixed frame, the auxiliary rod is rotatably connected to a splint at one end close to the fixed frame, and the surface of the splint is slidably connected to the fixed frame.

[0014] The effects achieved by the above components are: the devices inside the frame are protected from dust and moisture through the dust filter frame and the drying box. The dust filter frame and the drying box can be easily disassembled and assembled by rotating the auxiliary rod, which facilitates the subsequent replacement and maintenance of the desiccant and the dust filter frame, and is highly practical.

[0015] Preferably, a side of the clamping plate away from the auxiliary rod is fixedly connected with an anti-skid pad, and the anti-skid pad is a rubber pad.

[0016] The effects achieved by the above components are: the friction on the surface of the clamping plate is increased by the anti-slip pad, so that the clamping plate has a better limiting effect on the dust filter frame and the drying box.

[0017] Preferably, a round rod is fixedly connected to one side of the clamping plate close to the auxiliary rod, and the arc surface of the round rod is slidably connected to the fixing frame.

[0018] The effect achieved by the above components is: the clamping plate is further limited by the round rod, so that the clamping plate is more stable when moving.

[0019] Compared with the related art, the high-voltage inverter harmonic filtering device provided by the utility model has the following beneficial effects:

[0020] The utility model provides a high-voltage inverter harmonic filtering device. In the process of using the high-voltage inverter to adjust and control the power frequency, the high-frequency noise and electromagnetic interference generated by the high-voltage inverter will interfere with the device itself and the surrounding electrical equipment, affecting the system stability. The harmonic filtering device is used to generate a compensation current with the same amplitude and opposite polarity as the harmonic current of the power grid and inject it into the power grid to compensate or offset the harmonic current, which can effectively eliminate the interference generated by the high-voltage inverter. However, this harmonic filtering device may have the following problems during use. The filter module in the device needs to be connected to a number of cables, and the cables are prone to intertwining, resulting in a large amount of time spent on arranging the cables during subsequent maintenance operations, reducing the work efficiency of the maintenance operations. At this time, by setting an adjustment structure, the support plate is first rotated and opened. During this process, the support plate drives the connecting block to rotate along the inner wall of the support frame, and the iron sheet on the support plate is separated from the magnet on the fixed plate. The spring is in an extended state, and the pressure plate is continued to be moved until the pressure plate slides away from the limit rod, and then the pressure plate is rotated along the arc surface of the fixed rod to make the pressure plate rotate away from the surface of the support plate. In this process, the pressure plate is driven by the spring to rotate the ring, and the staff winds or stores several connecting wires on the support plate, and then rotates the pressure plate to reset, and aligns the pressure plate with the limit rod, gradually loosens the pressure plate, and the pressure plate moves in the direction close to the support plate under the action of the spring elastic force, and the limit rod gradually slides into the pressure plate to limit the pressure plate until the pressure plate cooperates with the support plate to clamp and limit the connecting wire, thereby achieving that the support plate can be conveniently stored and opened, and the support plate and the pressure plate are used to bundle and organize multiple connecting wires on the filter module, thereby reducing the time for subsequent arranging of the connecting wires, improving the work efficiency of maintenance operations, and having high practicality.

[0021] During the operation of the cooling fan, humid air and dust will enter the harmonic filtering device, causing adverse effects on the electrical equipment in the device. By setting an auxiliary structure, the auxiliary rod is first rotated, and the auxiliary rod moves in a direction away from the fixed frame with the help of a thread, and the auxiliary rod drives the splint to move, and then the drying box and the dust filter frame with desiccant are slid into the fixed frame in turn, and the auxiliary rod is rotated in the opposite direction, and the auxiliary rod moves in a direction close to the fixed frame with the help of a thread, and the auxiliary rod drives the splint to squeeze the drying box and the dust filter frame, so that the drying box and the dust filter frame are fixed in the fixed frame, wherein the friction on the surface of the splint is increased by the anti-slip pad, so that the limiting effect of the splint on the dust filter frame and the drying box is better, and the splint is further limited by the round rod, so that the splint is more stable when moving, so that the dust filter frame and the drying box are used to protect the devices inside the frame from dust and moisture, and the dust filter frame and the drying box can be conveniently disassembled and assembled by rotating the auxiliary rod, which is convenient for subsequent replacement and maintenance of the desiccant and the dust filter frame, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a harmonic filter device for a high-voltage frequency converter provided by the utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the rear structure;

[0024] Figure 3 for Figure 2 A schematic diagram of the structure of the regulatory structure shown;

[0025] Figure 4 for Figure 3 A schematic diagram of the disassembled structure of the regulating structure shown;

[0026] Figure 5 for Figure 4 A schematic diagram of the local structure of the regulating structure shown;

[0027] Figure 6 for Figure 2 A schematic diagram of the structure of the auxiliary structure shown;

[0028] Figure 7 for Figure 6 Schematic diagram of the disassembled structure of the auxiliary structure shown.

[0029] Numbers in the figure: 1. Frame; 2. Control interface; 3. Filter module; 4. Door panel; 5. Inspection door; 6. Cooling fan; 7. Adjustment structure; 701. Fixing plate; 702. Support frame; 703. Connecting block; 704. Support plate; 705. Magnetic block; 706. Iron sheet; 707. Fixing rod; 708. Ring; 709. Pressure plate; 710. Spring; 711. Limiting rod; 712. Arc groove; 713. Handle; 8. Auxiliary structure; 81. Fixing frame; 82. Dust filter frame; 83. Drying box; 84. Desiccant; 85. Auxiliary rod; 86. Clamp; 87. Anti-slip pad; 88. Round rod. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0032] See also Figures 1 to 7A high-voltage inverter harmonic filtering device provided by an embodiment of the utility model includes: a frame 1, a control interface 2 is arranged on the surface of the frame 1, a plurality of filter modules 3 are installed inside the frame 1, a door panel 4 is rotatably connected to one side of the frame 1, an inspection door 5 is rotatably connected to the side of the frame 1 away from the door panel 4, a cooling fan 6 is installed on the surface of the inspection door 5, an adjustment structure 7 is arranged at a position corresponding to the filter module 3 on one side of the inner wall of the frame 1, and an auxiliary structure 8 is arranged at a position corresponding to the cooling fan 6 on one side of the inspection door 5.

[0033] In the embodiments of the present invention, please refer to Figures 2 to 5 The adjustment structure 7 includes a plurality of fixed plates 701, which are fixedly connected to the frame 1. The surface of the fixed plate 701 is fixedly connected to a support frame 702. The side of the support frame 702 away from the fixed plate 701 is rotatably connected to a connecting block 703. The side of the connecting block 703 away from the support frame 702 is fixedly connected to a support plate 704. The side of the fixed plate 701 close to the support frame 702 is fixedly connected to a magnetic block 705. The side of the support plate 704 corresponding to the position of the magnetic block 705 is fixedly connected to There is an iron sheet 706, which is attracted to the magnetic block 705. The end of the support plate 704 away from the connecting block 703 is fixedly connected to a fixing rod 707. The arc surface of the fixing rod 707 is rotatably connected to a ring 708. The ring 708 is rotatably connected to the inner wall of the support plate 704. The arc surface of the fixing rod 707 is movably connected to a pressure plate 709. The arc surface of the fixing rod 707 is sleeved with a spring 710. The two ends of the spring 710 are respectively fixedly connected to the ring 708 and the pressure plate 709. The support plate 704 is close to the pressure plate 709. One side of the plate 709 is fixedly connected to a limit rod 711, and the arc surface of the limit rod 711 is slidably connected to the pressure plate 709. The support plate 704 can be easily stored and opened, and the support plate 704 and the pressure plate 709 are used to bundle the multiple connecting wires on the filter module 3, thereby reducing the time for subsequent arranging of the connecting wires, improving the work efficiency of the maintenance operation, and being highly practical. A plurality of arc grooves 712 are provided on the side where the support plate 704 and the pressure plate 709 are close to each other, and the plurality of arc grooves 712 are evenly distributed on the support plate 704. On the support plate 704 and the pressure plate 709, the arc groove 712 enables the pressure plate 709 and the support plate 704 to have a better storage and limiting effect on the connecting wires on the filter module 3. A handle 713 is fixedly connected to the side of the pressure plate 709 away from the support plate 704. The cross-section of the handle 713 is "U"-shaped. The pressure plate 709 is driven to move by operating the handle 713, which is convenient for the user to operate the pressure plate 709. The end of the limiting rod 711 close to the pressure plate 709 is in an arc shape, which facilitates the limiting rod 711 to slide into the pressure plate 709.

[0034] In the embodiments of the present invention, please refer to Figure 6 and Figure 7The auxiliary structure 8 includes a fixed frame 81, which is fixedly connected to the inspection door 5. A dust filter frame 82 is slidably connected to the inner wall of the fixed frame 81. A drying box 83 is slidably connected to the inner wall of the fixed frame 81. A desiccant 84 is arranged inside the drying box 83. An auxiliary rod 85 is threadedly inserted on one side of the fixed frame 81. A clamping plate 86 is rotatably connected to one end of the auxiliary rod 85 close to the fixed frame 81. The surface of the clamping plate 86 is slidably connected to the fixed frame 81. The dust filter frame 82 and the drying box 83 are used to protect the components inside the frame 1 from dust and moisture. The dust filter frame 82 and the drying box 83 can be rotated. The auxiliary rod 85 can be moved for convenient disassembly and assembly, which is convenient for the subsequent replacement and maintenance of the desiccant 84 and the dust filter frame 82, and is highly practical. The side of the splint 86 away from the auxiliary rod 85 is fixedly connected with an anti-skid pad 87, and the anti-skid pad 87 is a rubber pad. The anti-skid pad 87 increases the friction on the surface of the splint 86, so that the splint 86 has a better limiting effect on the dust filter frame 82 and the drying box 83. The side of the splint 86 close to the auxiliary rod 85 is fixedly connected with a round rod 88, and the arc surface of the round rod 88 is slidably connected to the fixed frame 81. The round rod 88 is used to further limit the splint 86, so that the splint 86 is more stable when moving.

[0035] The working principle of a high-voltage inverter harmonic filtering device provided by the utility model is as follows: in the process of using a high-voltage inverter to adjust and control the power frequency, the high-frequency noise and electromagnetic interference generated by the high-voltage inverter will interfere with the device itself and the surrounding electrical equipment, affecting the stability of the system. A harmonic filtering device is used to generate a compensation current with the same amplitude and opposite polarity as the harmonic current of the power grid and inject it into the power grid to compensate or offset the harmonic current, which can effectively eliminate the interference generated by the high-voltage inverter. However, this harmonic filtering device will have the following problems during use: the filter module 3 in the device needs to be connected to several cables and several electrical wires. The cables are easily entangled, which results in a lot of time spent on arranging the cables during subsequent maintenance work, reducing the efficiency of the maintenance work. At this time, by setting the adjustment structure 7, the support plate 704 is first rotated and opened. During this process, the support plate 704 drives the connecting block 703 to rotate along the inner wall of the support frame 702, and the iron sheet 706 on the support plate 704 is separated from the magnet on the fixed plate 701. The support plate 704 is continued to be rotated until it is fully opened, and then the support plate 704 is supported and the operating plate 709 is moved in a direction away from the support plate 704. During this process, the plate 709 moves along the fixing rod 707 and the limiting rod 71 1 slides, spring 710 is in an extended state, and the pressing plate 709 continues to move until the pressing plate 709 slides off the limiting rod 711, and then the pressing plate 709 is rotated along the arc surface of the fixing rod 707 to make the pressing plate 709 turn away from the surface of the supporting plate 704. In this process, the pressing plate 709 drives the ring 708 to rotate through the spring 710. The staff winds or stores several connecting wires on the supporting plate 704, then rotates the pressing plate 709 to reset, and aligns the pressing plate 709 with the limiting rod 711, and gradually loosens the pressing plate 709. The pressing plate 709 moves toward the direction close to the supporting plate 704 under the action of the elastic force of the spring 710, and the limiting rod 711 is pressed. 11 gradually slides into the pressure plate 709 to limit the pressure plate 709 until the pressure plate 709 cooperates with the support plate 704 to clamp and limit the connecting wires, wherein the arc groove 712 enables the pressure plate 709 and the support plate 704 to have a better storage and limiting effect on the connecting wires on the filter module 3, and the pressure plate 709 is driven to move by operating the handle 713, which is convenient for the user to operate the pressure plate 709, so that the support plate 704 can be easily stored and opened, and the support plate 704 and the pressure plate 709 are used to bundle the multiple connecting wires on the filter module 3, thereby reducing the time for subsequent arranging of the connecting wires, improving the work efficiency of maintenance operations, and having high practicality.

[0036] During the operation of the cooling fan 6, humid air and dust may enter the harmonic filter device, causing adverse effects on the electrical equipment in the device. By setting the auxiliary structure 8, the auxiliary rod 85 is first rotated, and the auxiliary rod 85 moves in a direction away from the fixed frame 81 with the help of the thread, and the auxiliary rod 85 drives the clamping plate 86 to move, and then the drying box 83 with the desiccant 84 and the dust filter frame 82 are sequentially slid into the fixed frame 81, and the auxiliary rod 85 is rotated in the opposite direction, and the auxiliary rod 85 moves in a direction close to the fixed frame 81 with the help of the thread, and the auxiliary rod 85 drives the clamping plate 86 to move the drying box 83 and the dust filter frame 82. The drying box 83 and the dust filter frame 82 are fixed in the fixed frame 81 by extrusion, wherein the friction on the surface of the splint 86 is increased by the anti-slip pad 87, so that the splint 86 has a better limiting effect on the dust filter frame 82 and the drying box 83, and the splint 86 is further limited by the round rod 88 to make the splint 86 more stable when moving, thereby achieving dust and moisture protection for the components inside the frame 1 by the dust filter frame 82 and the drying box 83, and the dust filter frame 82 and the drying box 83 can be conveniently disassembled and assembled by rotating the auxiliary rod 85, so that the subsequent replacement and maintenance of the desiccant 84 and the dust filter frame 82 is convenient, and the practicability is high.

[0037] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0038] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high voltage frequency converter harmonic filtering device, characterized in that: include: A frame (1), wherein a control interface (2) is provided on the surface of the frame (1), a plurality of filter modules (3) are installed inside the frame (1), a door panel (4) is rotatably connected to one side of the frame (1), a maintenance door (5) is rotatably connected to the side of the frame (1) away from the door panel (4), a cooling fan (6) is installed on the surface of the maintenance door (5), an adjustment structure (7) is provided at a position corresponding to the filter module (3) on one side of the inner wall of the frame (1), the adjustment structure (7) comprises a plurality of fixing plates (701), the plurality of fixing plates (701) are fixedly connected to the frame (1), a support frame (702) is fixedly connected to the surface of the fixing plate (701), a connection block (703) is rotatably connected to the side of the support frame (702) away from the fixing plate (701), a support plate (704) is fixedly connected to the side of the connection block (703) away from the support frame (702), and the fixing plate (701) is close to the support frame (701). A magnetic block (705) is fixedly connected to one side of the frame (702); an iron sheet (706) is fixedly connected to a position corresponding to the magnetic block (705) on one side of the support plate (704); the iron sheet (706) is attracted to the magnetic block (705); an end of the support plate (704) away from the connection block (703) is fixedly connected to a fixing rod (707); an arc surface of the fixing rod (707) is rotatably connected to a ring (708); the ring (708) is connected to the support plate ( The inner wall of the support plate (704) is rotatably connected, the arc surface of the fixing rod (707) is movably connected to a pressure plate (709), the arc surface of the fixing rod (707) is sleeved with a spring (710), the two ends of the spring (710) are respectively fixedly connected to the ring (708) and the pressure plate (709), the side of the support plate (704) close to the pressure plate (709) is fixedly connected to a limiting rod (711), and the arc surface of the limiting rod (711) is slidably connected to the pressure plate (709).

2. A high voltage frequency converter harmonic filtering device according to claim 1, characterized in that: A plurality of arc-shaped grooves (712) are provided on the side where the support plate (704) and the pressing plate (709) are close to each other, and the plurality of arc-shaped grooves (712) are evenly distributed on the support plate (704) and the pressing plate (709).

3. A high voltage frequency converter harmonic filtering device according to claim 1, characterized in that: A handle (713) is fixedly connected to one side of the pressing plate (709) away from the supporting plate (704); the cross section of the handle (713) is U-shaped.

4. A high voltage frequency converter harmonic filtering device according to claim 1, characterized in that: One end of the limiting rod (711) close to the pressing plate (709) is in an arc shape.

5. A high voltage frequency converter harmonic filtering device according to claim 1, characterized in that: An auxiliary structure (8) is provided on one side of the inspection door (5) at a position corresponding to the heat dissipation fan (6), the auxiliary structure (8) comprising a fixed frame (81), the fixed frame (81) being fixedly connected to the inspection door (5), a dust filter frame (82) being slidably connected to the inner wall of the fixed frame (81), a drying box (83) being slidably connected to the inner wall of the fixed frame (81), a desiccant (84) being arranged inside the drying box (83), an auxiliary rod (85) being threadedly inserted on one side of the fixed frame (81), a clamping plate (86) being rotatably connected to one end of the auxiliary rod (85) close to the fixed frame (81), and a surface of the clamping plate (86) being slidably connected to the fixed frame (81).

6. A high voltage frequency converter harmonic filtering device according to claim 5, characterized in that: A side of the clamping plate (86) away from the auxiliary rod (85) is fixedly connected with an anti-skid pad (87), and the anti-skid pad (87) is a rubber pad.

7. A high voltage frequency converter harmonic filtering device according to claim 5, characterized in that: A round rod (88) is fixedly connected to one side of the clamping plate (86) close to the auxiliary rod (85), and the arc surface of the round rod (88) is slidably connected to the fixed frame (81).

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