CN210379859U

CN210379859U - Three-phase unbalance compensation cabinet type active filter

Info

Publication number: CN210379859U
Application number: CN201921776733.9U
Authority: CN
Inventors: 柳永刚; 陈星亮
Original assignee: China Merchants Minzhi Technology Engineering Co Ltd
Current assignee: China Merchants Minzhi Technology Engineering Co Ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-04-21
Anticipated expiration: 2029-10-22

Abstract

The utility model relates to a three-phase unbalance compensation cabinet type active filter, a door plate component comprises a door plate, a sealing ring and two fixing strips which are arranged in parallel; a double-layer framework group is fixed between the two fixing strips, and the sealing ring surrounds the door plate inner plate, the fixing strips, the double-layer framework group fixed between the fixing strips and the door plate middle plate to form a door plate sealing part; the door panel component is rotatably and openably fixed on the opening surface of the box body with the single surface open, when the door panel component is closed, the door panel outer plate covers the sealing frame, and the door panel sealing part enters the box body with the single surface open; the utility model discloses three-phase unbalance compensation cabinet type active filter, the box structure of active filter is whole removable, and the three-layer plate structure based on the double-layer framework can guarantee to realize high-efficient sound insulation under the light prerequisite; the door panel assembly is arranged, so that the cabinet type box body is convenient to open, the sound insulation and shock absorption effects are met, the position of the support is adjustable, more possibilities are provided for the erection position of an electronic system, and the possibility of modularizing and increasing the assemblies is also provided.

Description

Three-phase unbalance compensation cabinet type active filter

Technical Field

The utility model belongs to active filter structure field, concretely relates to unbalanced three phase compensation cabinet type active filter.

Background

Electronic equipment often has the problem of generating heat and dissipating heat when in use, and the electronic equipment is reduced in efficiency or damaged if not effectively treated. As a harmonic suppression device, an active filter generates heat more seriously, resulting in a greater number of internal fans. In some active filters, multiple cooling methods are arranged in the active filters to cooperate together to achieve effective cooling, and thus the heating condition of the active filters is very serious. For a non-research mechanism, an air conditioner is not generally arranged in a machine room, and the high temperature in the machine room hinders the heat dissipation efficiency of the active filter.

The operation of the active filter is accompanied by noise of the cooling fan and current noise of the components common to the electronic equipment. This noise is very unfavorable to the working environment of maintenance personnel, and is particularly serious when a plurality of active filters are arranged in parallel. Meanwhile, the vibration caused by the operation of the cooling fan is transmitted to the box plate of the active filter. The noise caused by the low frequency vibration generated by the box plate also has adverse effect on the working environment of maintenance personnel. The low frequency vibration of the instrument also affects the reliability of the connection points of various devices in the instrument. How to realize sound insulation and shock absorption on the box wall has great difficulty.

When active filter has the cabinet door, conveniently overhaul the device in it. But cabinet door formula active filter, difficult realization fine shock attenuation sound insulation effect under small-size. For the position adjustment of elements in the active filter, how to simply and conveniently and simultaneously not influence the sound insulation and shock insulation effects has greater difficulty.

SUMMERY OF THE UTILITY MODEL

The utility model aims at, overcome the technical problem who exists among the above-mentioned background art, provide a three-phase unbalance compensation cabinet type active filter.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

a three-phase unbalance compensation cabinet type active filter comprises a box wall plate, a box sealing plate, a door plate assembly, a double-layer framework, a shock insulation strip and a sealing frame.

Two ends of the frame body of the frame unit in the double-layer frame are provided with end threaded holes, and two side walls of the frame body are provided with side threaded hole groups.

The wall plate comprises a wall plate inner plate, a wall plate middle plate and a wall plate outer plate; the box sealing plate comprises a sealing plate inner plate, a sealing plate middle plate and a sealing plate outer plate; the door panel of the door panel component comprises a door panel inner plate, a door panel middle plate and a door panel outer plate.

Double-layer frameworks are longitudinally arranged and fixed between the sealing plate inner plates of the two box sealing plates, the arrangement interval between the two layers of frameworks of the double-layer frameworks is 6-8mm, the thickness of the wall plate is 2-5mm, and the wall plate is adhered and fixed on any side layer framework between the two layers of frameworks; the wall plate inner plate and the wall plate outer plate of the box wall plate are fixed on two sides of the longitudinally-arranged double-layer framework array, and the interlayer distance between the wall plate inner plate and the wall plate outer plate is 2-5 cm; the double-layer framework which is longitudinally arranged, the wallboard inner plate and the wallboard outer plate are connected, and the screws penetrate through the side thread hole groups of the framework units, so that the double-layer framework is convenient to disassemble and maintain. The support passes through the wallboard inner panel through the support nail and is fixed in on the inside layer skeleton of double-deck skeleton. If the box wall of the active filter is of a single-layer structure, the vibration of elements in the active filter is directly transmitted to the box wall. After the wallboard inner plate or the wallboard outer plate is provided with the mounting element, the whole sound insulation effect of the wall plate is ensured. The middle plate of the wallboard does not completely fill the gap layer between the double-layer frameworks, but has a broken layer; the break-off layer interrupts the shock transmission path from the inside to the outside. The typical installation process of the box wall plate and the box sealing plate is as follows: fixing the longitudinally-arranged double-layer framework group on a sealing plate inner plate to form a support, then installing the wallboard inner plate, the wallboard middle plate and the wallboard outer plate on the longitudinally-arranged framework group, and finally sealing the sealing plate inner plate at the other end of the longitudinally-arranged double-layer framework group to form a box body with a single open side. Both ends of the outer plate of the wall plate exceed the inner plates of the sealing plates at the upper and lower positions by 2-5 cm.

The double-layer frameworks are transversely arranged on the outer side of a sealing plate inner plate of the box sealing plate, the arrangement interval between the double-layer frameworks is 6-8mm, the transversely arranged double-layer frameworks are arranged perpendicular to the opening face of the cabinet type active filter, one ends of the transversely arranged double-layer frameworks are fixedly connected with a wall plate outer plate, the other ends of the transversely arranged double-layer frameworks are connected with a sealing frame, the side walls of the frameworks of framework units in the transversely arranged double-layer frameworks are matched with the sealing plate inner plate, and the thickness of the plates in the sealing plate is 2-5mm and; the double-layer framework transversely arranged is connected with the wallboard outer plate and the sealing frame in an installing manner, and is fixed on the double-layer framework transversely arranged through screws, so that the double-layer framework is convenient to disassemble. The transversely arranged double-layer frameworks are connected with the outer plate of the sealing plate back to the inner plate side of the sealing plate, and form a box body with an open single side with the outer plate of the wall plate; when the active filter is disassembled, the box sealing plate is firstly disassembled, and then the box wall plate is disassembled. An electronic system is arranged in the box body with one open side; the electronic system is fixed on the bracket, and the position of the bracket can be adjusted, so that more possibilities are provided for the erection position of the electronic system, and the possibility of modularly increasing components is also provided. The fixed contact surface of the bracket and the electronic system is provided with a shock insulation strip, and the contact surface of the bracket and the inner plate of the wall plate is provided with a shock insulation strip.

The door plate component comprises a door plate, a sealing ring and two fixing strips which are arranged in parallel; a double-layer framework group is fixed between the two fixing strips, the interval between the two layers of frameworks of the double-layer framework is 6-8mm, the thickness of the middle plate of the door plate is 2-5mm, and the middle plate is fixed on the inner layer framework between the two layers of frameworks; the inner door plate and the outer door plate of the door plate are fixed on two sides of the double-layer framework group between the fixing strips, and the interlayer distance between the inner door plate and the outer door plate is 2-5 cm; the sealing ring surrounds the door plate inner plate, the fixing strips, and a double-layer framework group and the door plate middle plate are fixed among the fixing strips to form a door plate sealing part; after the door plant inner panel is installed the component in setting up of door plant medium plate, the whole syllable-dividing effect of door plant obtains guaranteeing. The door plant medium plate does not fill the clearance between the double-deck skeleton completely, and has the disconnection layer, and the disconnection layer has been insulated from inside to outside vibrations transmission channel. The door panel component is rotatably and openably fixed on the opening surface of the box body with the single surface open, when the door panel component is closed, the door panel outer plate covers the sealing frame, and the door panel sealing part enters the box body with the single surface open; the door panel of multicavity structure has strengthened the shock attenuation of door panel subassembly and has given sound insulation effect. The door plate is provided with a hollow window, and an observation window is arranged in the hollow window; the door panel component is connected with the box body with a single open side in an openable and closable manner through the fastener.

Shock insulation strips are arranged between contact interfaces between the box wall plate and between contact interfaces between the box sealing plate and the box wall plate in a bonding mode; the contact parts of the framework units which are longitudinally arranged and the wallboard inner plate, the wallboard middle plate and the wallboard outer plate are provided with shock insulation strips in a bonding mode, the contact parts of the framework units which are transversely arranged and the sealing plate inner plate, the sealing plate middle plate and the sealing plate outer plate are provided with shock insulation strips in a bonding mode, and the contact parts of the framework units between the fixing strips and the door plate inner plate, the door plate middle plate and the door plate outer plate are provided with shock insulation strips in a bonding mode; the shock insulation strip is with the contact between case wallboard and the tank wall board, the contact between case shrouding and the tank wall board, vertically skeleton unit and the wallboard inner panel of arranging, the wallboard medium plate, the contact of wallboard planking, transversely the skeleton unit and the shrouding inner panel of arranging, the shrouding medium plate, the contact of shrouding planking, skeleton unit and door plant inner panel between the fixed strip, the door plant medium plate, the contact of door plant planking changes flexible connection into, the whole hard joint that will be convenient for transmit vibrations breaks completely, increased syllable-dividing and shock attenuation effect has been realized.

The cavity between the wallboard inner plate and the wallboard middle plate and the cavity between the wallboard middle plate and the wallboard outer plate are filled with shock-absorbing sponge; the cavity between the sealing plate inner plate and the sealing plate middle plate and the cavity between the sealing plate middle plate and the sealing plate outer plate are filled with shock-absorbing sponge; the cavity between the door plate inner plate and the door plate middle plate and the cavity between the door plate middle plate and the door plate outer plate are filled with shock-absorbing sponge. The shock absorption sponge absorbs shock and noise, and the auxiliary shock insulation strips reduce the external shock sensation of the active filter. When the whole active filter operates, the inside of the active filter is filled with noise generated by the fan and the device, and the sound insulation treatment is only carried out at the air inlet and the air outlet of the active filter, so that the sound insulation treatment is meaningless, and the single-layer box plate structure cannot play a good sound insulation effect. The box wall structure with multiple inner cavities can meet the sound insulation and shock absorption effects on the premise of meeting the strength. Sound insulation and vibration damping refer to both air and mechanical vibration modes.

The electronic system comprises a current transformer, a signal processing circuit, an FPGA controller, a display and an active filtering module, wherein an IGBT driving circuit used for receiving a control signal of the FPGA controller and generating a driving control signal, an IGBT power converter used for generating a harmonic compensation current with a phase opposite to that of a load harmonic current and a three-phase unbalance compensation current and an output reactor used for connecting the IGBT power converter with a circuit and stably outputting the current are further arranged in the active filtering module.

The active power filter collects current signals in real time through an external current transformer, a harmonic part in the current signals is separated through an internal detection circuit, and compensation current with the same size and the opposite phase with the harmonic in the system is generated through an IGBT power converter, so that the function of filtering the harmonic is realized. The output compensation current of the active power filter is dynamically and accurately changed according to the harmonic quantity of the system, so that the problem of overcompensation is avoided. In addition, the active power filter has an overload protection function, and when the harmonic quantity of the system is greater than the capacity of the filter, the device can automatically limit the output at 100% rated capacity without overload.

Preferably, the thickness of the inner plate of the wallboard is larger than that of the middle plate and the outer plate of the wallboard; the thickness of the sealing plate inner plate is larger than that of the sealing plate middle plate and that of the sealing plate outer plate; the thickness of the inner plate of the door panel is larger than that of the middle plate and the outer plate of the door panel. The plates with different thicknesses can reduce the external vibration sense of the active filter generated by the resonance effect; meanwhile, the thicknesses of the inner plate of the wall plate, the inner plate of the door plate and the inner plate of the sealing plate are large, so that the electronic element is convenient to fix.

Preferably, the seismic isolation strip is a polyurethane seismic isolation strip.

Preferably, the shock-absorbing sponge is melamine cotton.

Preferably, the middle part of the frame body is provided with a hollow part. The fretwork is guaranteed to inhale the circulation of air that shakes the sponge filling intracavity, does benefit to the heat dissipation. Especially, it is more important for the surface on which the heat radiation fan is mounted.

An air cooling system is arranged on the top inside the active filter, and an air cooling system is arranged on the inner side of the door plate. The multi-cavity system of the box wall and the heat insulation effect of the shock absorption sponge ensure that the cold environment in the cabinet type active filter is not influenced by the external hot environment.

The utility model provides a cabinet type active filter of unbalanced three phase compensation has following beneficial effect:

1. the box body structure of the active filter is integrally detachable, and a three-layer plate structure based on a double-layer framework can realize high-efficiency sound insulation on the premise of ensuring light weight; the cabinet type box body is convenient to open due to the arrangement of the door plate assembly, and the sound insulation and shock absorption effects are met.

2. The shock insulation strips completely break the integral hard connection of the box body convenient for transmitting the shock, thereby realizing the effect of increasing the sound insulation and shock absorption;

3. the board of different thickness can reduce the active filter external vibration sense that produces by the resonance effect.

4. The shrouding medium plate is not filling the clearance between the double-deck skeleton completely, and has the disconnection layer, and the disconnection layer has been isolated from inside to outside vibrations transmission channel, has increased syllable-dividing and shock attenuation effect.

5. After the setting up of shrouding medium plate makes the last installation component of shrouding inner panel, the whole syllable-dividing effect of case shrouding obtains guaranteeing.

6. After the wallboard inner panel is provided with the element by the arrangement of the wallboard middle plate, the whole sound insulation effect of the wall plate is ensured.

7. The position of the bracket is adjustable, so that more possibilities are provided for the erection position of an electronic system, and the possibility of modularizing and increasing components is also provided.

Drawings

Fig. 1 is a front view of a cabinet type active filter according to the present invention;

FIG. 2 is a front view of the framework unit of the present invention;

FIG. 3 is a schematic view of the two-layer frame transversely arranged outside the inner plate of the sealing plate of the present invention;

FIG. 4 is a schematic view of the mounting structure of the box sealing plate of the present invention;

fig. 5 is a schematic view of the installation structure of the box wall plate of the present invention;

FIG. 6 is a partial schematic view of the box wall panel and the double-layer frame of the present invention;

FIG. 7 is a schematic view of the door panel assembly of the present invention;

FIG. 8 is a schematic view of the door panel assembly of the present invention;

fig. 9 is a schematic view of the bracket of the present invention being fixed to the inner plate of the wall plate;

reference numerals: the box wall plate comprises a box wall plate 1, a wall plate inner plate 101, a wall plate middle plate 102, a wall plate outer plate 103, a support 104, support nails 105, a box sealing plate 2, a sealing plate inner plate 201, a sealing plate middle plate 202, a sealing plate outer plate 203, a door plate assembly 3, a door plate 31, a sealing ring 32, hollow windows 33, observation windows 34, a door plate inner plate 301, a door plate middle plate 302, a door plate outer plate 303, fixing strips 304, a double-layer framework 4, a framework unit 40, a framework 401, end threaded holes 402, side threaded hole groups 403, hollow-out holes 404, shock insulation strips 5, a sealing frame 6, an electronic system 7, an air cooling system 701 and.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-9, a three-phase unbalance compensation cabinet type active filter includes a box wall plate 1, a box sealing plate 2, a door panel assembly 3, a double-layer framework 4, a vibration isolation strip 5 and a sealing frame 6.

End threaded holes 402 are formed in both ends of a frame body 401 of the frame unit 40 in the double-layer framework 4, and side threaded hole groups 403 are formed in both side walls of the frame body 401.

The box wall plate 1 comprises a wall plate inner plate 101, a wall plate middle plate 102 and a wall plate outer plate 103; the box sealing plate 2 comprises a sealing plate inner plate 201, a sealing plate middle plate 202 and a sealing plate outer plate 203; the door panel 31 of the door panel assembly 3 includes a door panel inner panel 301, a door panel middle panel 302, and a door panel outer panel 303.

The double-layer frameworks 4 are longitudinally arranged and fixed between the sealing plate inner plates 201 of the two box sealing plates 2, the interval between the two layers of frameworks of the double-layer frameworks 4 is 6mm, and the wall plate middle plate 102 is 2mm thick and is fixedly bonded on any side layer framework between the two layers of frameworks; the wall plate inner plate 101 and the wall plate outer plate 103 of the box wall plate 1 are fixed on two sides of the double-layer skeleton 4 array which is longitudinally arranged, and the layer distance between the wall plate inner plate 101 and the wall plate outer plate 103 is 2 cm; the double-layer frameworks 4 which are longitudinally arranged are connected with the inner wallboard plate 101 and the outer wallboard plate 103 through screws penetrating through the side threaded hole groups 403 of the framework units 40, so that the double-layer frameworks are convenient to disassemble and maintain. The bracket 104 is fixed on the inner layer framework of the double-layer framework 4 by a bracket nail 105 through the inner wall plate 101; if the box wall of the active filter is of a single-layer structure, the vibration of elements in the active filter is directly transmitted to the box wall. The arrangement of the wall plate middle plate 102 ensures that the integral sound insulation effect of the wall plate 1 is ensured after components are mounted on the wall plate inner plate 101 or the wall plate outer plate 103. The wallboard middle plate 102 does not completely fill the gap layer between the double-layer frameworks 4, but has a broken layer; the break-off layer interrupts the shock transmission path from the inside to the outside. The installation process of the typical box wall plate 1 and the box sealing plate 2 is as follows: fixing the double-layer frameworks 4 which are longitudinally arranged on one sealing plate inner plate 201 to form a support, then installing the wallboard inner plate 101, the wallboard middle plate 102 and the wallboard outer plate 103 on the frameworks 3 which are longitudinally arranged, and finally sealing the sealing plate inner plate 201 at the other end of the double-layer frameworks 4 which are longitudinally arranged to form a box body with a single side open. The size of the sealing plate inner plate 201 of which both ends of the wall plate outer plate 103 exceed the upper and lower positions is 2 cm.

The double-layer frameworks 4 are transversely arranged on the outer side of a sealing plate inner plate 201 of the box sealing plate 2, the interval between the two layers of frameworks of the double-layer frameworks 4 is 6mm, the transversely arranged double-layer frameworks 4 are perpendicular to the opening face of the cabinet type active filter, one ends of the transversely arranged double-layer frameworks 4 are fixedly connected with a wall plate outer plate 103, the other ends of the transversely arranged double-layer frameworks 4 are connected with a sealing frame 6, the side wall of a framework 401 of a framework unit 40 in the transversely arranged double-layer frameworks 4 is matched with the sealing plate inner plate 201, and a middle plate 202 is 2mm thick and; the double-layer framework 4 transversely arranged is connected with the wallboard outer plate 103 and the sealing frame 6 in an installing mode, and is fixed on the double-layer framework 4 transversely arranged through screws, so that the double-layer framework is convenient to disassemble. The transversely arranged double-layer frameworks 4 are back to the sealing plate outer plate 203 connected with the sealing plate inner plate 201 side, and form a box body with a single side opened with the wall plate outer plate 103; when the active filter is disassembled, the box sealing plate 2 is firstly disassembled, and then the box wall plate 1 is disassembled. An electronic system 7 is arranged in the box body with one open side; the electronic system 7 is fixed on the bracket 104, and the position of the bracket 104 can be adjusted, so that more possibilities are provided for the erection position of the electronic system 7, and the possibility of modularly adding components is also provided. The fixed contact surface of the bracket 104 and the electronic system 7 is provided with a shock insulation strip 5, and the contact surface of the bracket 104 and the wall plate inner plate 101 is provided with the shock insulation strip 5.

The door panel component 3 comprises a door panel 31, a sealing ring 32 and two fixing strips 304 which are arranged in parallel; a double-layer framework 4 group is fixed between the two fixing strips 304, the interval between the two layers of frameworks of the double-layer framework 4 is 6mm, and the door panel middle plate 302 is 2mm thick and is fixed on the inner layer framework between the two layers of frameworks; the inner door panel plate 301 and the outer door panel plate 303 of the door panel 31 are fixed on two sides of the double-layer framework 4 group between the fixing strips 304, and the interlayer distance between the inner door panel plate 301 and the outer door panel plate 303 is 2 cm; the sealing ring 32 surrounds the door panel inner plate 301, the fixing strip 304, the double-layer framework 4 group fixed among the fixing strips 304 and the door panel middle plate 302 to form a door panel sealing part; the arrangement of the door panel middle plate 302 ensures the whole sound insulation effect of the door panel 31 after the components are mounted on the door panel inner plate 301. The door panel middle plate 302 does not completely fill the gap between the double-layered frameworks 4, but there is a broken layer which breaks the inside-out shock transmission channel. The door panel component 3 is fixed on the open surface of the box body with a single open surface in a rotary and openable way, when the door panel component 3 is closed, the door panel outer plate 303 covers the sealing frame 6, and the door panel sealing part enters the box body with the single open surface; the multi-chamber door panel 31 enhances the shock-absorbing and sound-insulating effects of the door panel assembly 3. A hollow window 33 is arranged on the door panel 31, and an observation window 34 is arranged in the hollow window 33; the door panel assembly 3 is connected to the box body with one side open by a fastener (not shown).

Shock insulation strips 5 are arranged between contact interfaces between the box wall plate 1 and between the box sealing plate 2 and the box wall plate 1 in a bonding mode; shock insulation strips 5 are arranged at the contact parts of the framework units 30, the wallboard inner plate 101, the wallboard middle plate 102 and the wallboard outer plate 103 which are longitudinally arranged in an adhesion mode, shock insulation strips 5 are arranged at the contact parts of the framework units 30, the sealing plate inner plate 201, the sealing plate middle plate 202 and the sealing plate outer plate 203 which are transversely arranged in an adhesion mode, and shock insulation strips 5 are arranged at the contact parts of the framework units 30, the wallboard inner plate 301, the door plate middle plate 302 and the door plate outer plate 303 among the fixing strips 304 in an adhesion mode; shock insulation strip 5 with the contact between case wallboard 1 and the case wall board 1, contact between case shrouding 2 and the case wall board 1, vertically skeleton unit 30 and wallboard inner panel 101 of arranging, wallboard middle plate 102, the contact of wallboard planking 103, transversely skeleton unit 30 and shrouding inner panel 201 of arranging, shrouding middle plate 202, the contact of shrouding planking 203, skeleton unit 30 and wallboard inner panel 301 between fixed strip 304, door plant middle plate 302, the contact of door plant planking 303 is changed into flexonics, the whole hard joint that will be convenient for transmit vibrations breaks completely, increased syllable-dividing and shock attenuation effect has been realized.

A cavity between the inner wall plate 101 and the middle wall plate 102 and a cavity between the middle wall plate 102 and the outer wall plate 103 are filled with shock-absorbing sponge (not shown); a cavity between the sealing plate inner plate 201 and the sealing plate middle plate 202 and a cavity between the sealing plate middle plate 202 and the sealing plate outer plate 203 are filled with shock-absorbing sponge; the cavity between the door panel inner plate 301 and the door panel middle plate 302 and the cavity between the door panel middle plate 302 and the door panel outer plate 303 are filled with shock-absorbing sponge. The shock-absorbing sponge absorbs shock and noise, and the auxiliary shock-isolating strips 5 reduce the shock sensation outside the active filter. When the whole active filter operates, the inside of the active filter is filled with noise generated by the fan and the device, and the sound insulation treatment is only carried out at the air inlet and the air outlet of the active filter, so that the sound insulation treatment is meaningless, and the single-layer box plate structure cannot play a good sound insulation effect. The box wall structure with multiple inner cavities can meet the sound insulation and shock absorption effects on the premise of meeting the strength. Sound insulation and vibration damping refer to both air and mechanical vibration modes.

The electronic system 7 comprises a current transformer, a signal processing circuit, an FPGA controller, a display and an active filtering module, wherein an IGBT driving circuit used for receiving a control signal of the FPGA controller and generating a driving control signal, an IGBT power converter used for generating a harmonic compensation current with a phase opposite to that of a load harmonic current and a three-phase unbalance compensation current and an output reactor used for connecting the IGBT power converter with a circuit and stably outputting the current are further arranged in the active filtering module.

In specific implementation, the thickness of the wallboard inner plate 101 is 1.5 times that of the wallboard middle plate 102 and the wallboard outer plate 103; the thickness of the sealing plate inner plate 201 is 1.5 times that of the sealing plate middle plate 202 and the sealing plate outer plate 203; the thickness of the inner panel 301 is 1.5 times that of the middle panel plate 302 and the outer panel plate 303. The plates with different thicknesses can reduce the external vibration sense of the active filter generated by the resonance effect; meanwhile, the wall plate inner plate 101, the door plate inner plate 301 and the sealing plate inner plate 201 are large in thickness, so that electronic components can be fixed conveniently.

In a specific implementation, the shock insulation strip 5 is a polyurethane shock insulation strip.

In specific implementation, the shock-absorbing sponge is melamine cotton.

In a specific implementation, a hollow 404 is disposed in the middle of the frame 401. The fretwork 404 guarantees to inhale the circulation of air that shakes the sponge filling intracavity, does benefit to the heat dissipation. Especially, it is more important for the surface on which the heat radiation fan is mounted.

An air cooling system 701 is arranged on the top inside the active filter, and an air cooling system 702 is arranged on the inner side of the door panel 31. The multi-cavity system of the box wall and the heat insulation effect of the shock absorption sponge ensure that the cold environment in the cabinet type active filter is not influenced by the external hot environment.

The embodiment is only a single implementation manner of the present invention, and for those skilled in the art, other embodiments can be obtained according to the attached drawings without any creative effort, and are also within the protection scope of the present invention.

Claims

1. A cabinet type active filter for three-phase unbalance compensation is characterized in that: the box comprises a box wall plate (1), a box sealing plate (2), a door plate assembly (3), a double-layer framework (4), a shock insulation strip (5) and a sealing frame (6);

two ends of a frame body (401) of a frame unit (40) in the double-layer frame (4) are provided with end threaded holes (402), two side walls of the frame body (401) are provided with side threaded hole groups (403),

the box wall plate (1) comprises a wall plate inner plate (101), a wall plate middle plate (102) and a wall plate outer plate (103); the box sealing plate (2) comprises a sealing plate inner plate (201), a sealing plate middle plate (202) and a sealing plate outer plate (203); the door panel (31) of the door panel component (3) comprises a door panel inner plate (301), a door panel middle plate (302) and a door panel outer plate (303);

a double-layer framework (4) is longitudinally arranged and fixed between the sealing plate inner plates (201) of the two box sealing plates (2), the arrangement interval between the two layers of frameworks of the double-layer framework (4) is 6-8mm, and the wall plate middle plate (102) is 2-5mm thick and is fixed on any side layer framework between the two layers of frameworks; the wall plate inner plate (101) and the wall plate outer plate (103) of the box wall plate (1) are fixed at two sides of the longitudinally-arranged double-layer framework (4) array, and the interlayer distance between the wall plate inner plate (101) and the wall plate outer plate (103) is 2-5 cm; the double-layer framework (4) which is longitudinally arranged, the wallboard inner plate (101) and the wallboard outer plate (103) are connected and penetrate through a side threaded hole group (403) of the framework unit (40) through screws, and the bracket (104) penetrates through the wallboard inner plate (101) through a bracket nail (105) and is fixed on an inner layer framework of the double-layer framework (4); both ends of the wall plate outer plate (103) exceed the sealing plate inner plates (201) at the upper and lower positions by 2-5 cm;

the double-layer frameworks (4) are transversely arranged on the outer side of a sealing plate inner plate (201) of the box sealing plate (2), the arrangement interval between the two layers of frameworks of the double-layer frameworks (4) is 6-8mm, the transversely arranged double-layer frameworks (4) are perpendicular to the opening face of the cabinet type active filter, one ends of the transversely arranged double-layer frameworks (4) are fixedly connected with the outer wall plate (103), the other ends of the transversely arranged double-layer frameworks (4) are connected with a sealing frame (6), the side wall of a frame body (401) of a framework unit (40) in the transversely arranged double-layer frameworks (4) is matched with the sealing plate inner plate (201), and the sealing plate middle plate (202) is 2-5mm thick and is fixed on the; the transversely arranged double-layer frameworks (4) are back to the plate outer plates (203) connected with the plate inner plates (201) and form a box body with a single open side with the plate outer plates (103); an electronic system (7) is arranged in the box body with the single open side; the electronic system (7) is fixed on the bracket (104), the shock insulation strip (5) is arranged on the fixed contact surface of the bracket (104) and the electronic system (7), and the shock insulation strip (5) is arranged on the contact surface of the bracket (104) and the wall plate inner plate (101);

the door plate component (3) comprises a door plate (31), a sealing ring (32) and two fixing strips (304) which are arranged in parallel; a double-layer framework (4) group is fixed between the two fixing strips (304), the interval between the two layers of frameworks of the double-layer framework (4) is 6-8mm, and the door panel middle plate (302) is 2-5mm thick and is fixed on the inner layer framework between the two layers of frameworks; the inner door plate (301) and the outer door plate (303) of the door plate (31) are fixed on two sides of the double-layer framework (4) group between the fixing strips (304), and the interlayer distance between the inner door plate (301) and the outer door plate (303) is 2-5 cm; the sealing ring (32) surrounds the door panel inner plate (301), the fixing strip (304), a double-layer framework (4) group is fixed between the fixing strips (304) and the door panel middle plate (302) to form a door panel sealing part; the door panel component (3) is rotatably and openably fixed on the opening surface of the box body with the single surface open, when the door panel component (3) is closed, the door panel outer plate (303) covers the sealing frame (6), and the door panel sealing part enters the box body with the single surface open;

shock insulation strips (5) are arranged between contact interfaces between the box wall plate (1) and between the box sealing plate (2) and the box wall plate (1); shock insulation strips (5) are arranged at the contact parts of the framework units (30) which are longitudinally arranged, the wall plate inner plate (101), the wall plate middle plate (102) and the wall plate outer plate (103), shock insulation strips (5) are arranged at the contact parts of the framework units (30) which are transversely arranged, the sealing plate inner plate (201), the sealing plate middle plate (202) and the sealing plate outer plate (203), and shock insulation strips (5) are arranged at the contact parts of the framework units (30) and the door plate inner plate (301), the door plate middle plate (302) and the door plate outer plate (303) among the fixing strips (304);

a cavity between the wallboard inner plate (101) and the wallboard middle plate (102) and a cavity between the wallboard middle plate (102) and the wallboard outer plate (103) are filled with shock-absorbing sponge; a cavity between the sealing plate inner plate (201) and the sealing plate middle plate (202) and a cavity between the sealing plate middle plate (202) and the sealing plate outer plate (203) are filled with shock-absorbing sponge; and a cavity between the door panel inner plate (301) and the door panel middle plate (302) and a cavity between the door panel middle plate (302) and the door panel outer plate (303) are filled with shock-absorbing sponge.

2. The three-phase imbalance compensation cabinet active filter according to claim 1, wherein the wall plate inner plate (101) has a greater thickness than both the wall plate middle plate (102) and the wall plate outer plate (103); the thickness of the sealing plate inner plate (201) is larger than that of the sealing plate middle plate (202) and that of the sealing plate outer plate (203); the thickness of the door panel inner plate (301) is larger than that of the door panel middle plate (302) and that of the door panel outer plate (303).

3. The three-phase imbalance compensation cabinet type active filter according to any one of claims 1 to 2, wherein the seismic isolation strips (5) are polyurethane seismic isolation strips.

4. The three-phase imbalance compensation cabinet type active filter according to any one of claims 1 to 2, wherein the shock absorbing sponge is melamine cotton.

5. The three-phase imbalance compensation cabinet type active filter according to any one of claims 1 to 2, wherein a hollow part (404) is arranged in the middle of the frame body (401).