Low-voltage active power filter cabinet

Abstract

The utility model discloses a low-voltage active power filter cabinet, and relates to the related technical field of electrical control equipment. The device comprises an outer box body, a supporting frame, a limiting strip, door plates and a soft exhaust sleeve, the soft exhaust sleeve is fixedly communicated with the rear side of the outer box body, the door plates are symmetrically arranged on the front side of the outer box body, two ventilation nets are fixed in the door plates in a penetrating mode, the ventilation nets in the same door plate are symmetrically arranged along the transverse center line in the door plates, and the supporting frame is fixed to the lower portion in the outer box body. A limiting strip is arranged on the front side of the top of the supporting frame, and inserting plates are symmetrically fixed to the bottom of the limiting strip and inserted into the supporting frame. By arranging the outer box body, the support frame, the limiting strip, the door plate and the soft exhaust sleeve, the problems that the low-voltage active filter in the low-voltage active filter cabinet is inconvenient to take out, maintain, put back and install, and the heat dissipation efficiency is not high enough are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to electrical control equipment, and particularly relates to a low-voltage active filter cabinet. Background Art

[0002] The low-voltage active filter cabinet is a power quality improvement device used in power systems. It can detect and compensate for harmonic currents in the power grid in real time, reduce the adverse effects of harmonics on power equipment, and improve power quality. The low-voltage active filter cabinet usually adopts a voltage source inverter structure, and collects system harmonic currents through current transformers. The controller quickly calculates and extracts the content of each harmonic current, generates a compensation current with the same amplitude as the harmonic current but opposite direction, and injects it into the power system, thereby offsetting the harmonic current generated by nonlinear loads. However, it still has the following disadvantages in actual use:

[0003] When the low-voltage active filter cabinet is working, the corresponding structure is directly installed in the appropriate position. During the operation, the low-voltage active filter installed inside is directly used for filtering. However, in long-term use, the low-voltage active filter will inevitably fail and need maintenance. During the maintenance process, it is not convenient to take out the low-voltage active filter for maintenance;

[0004] When the low-voltage active filter cabinet is working, in order to reduce the heat during operation, a fan is used for active heat dissipation. During the active heat dissipation process, exhaust is required, but the filter cabinet is usually a closed structure. When dissipating heat, the air circulates directly in the cabinet, which will cause the temperature in the cabinet to rise rapidly. The heat can only be dissipated passively through the surface of the cabinet, and the heat dissipation efficiency is poor. Utility Model Content

[0005] The utility model aims to provide a low-voltage active filter cabinet, which solves the problems of inconvenient removal, maintenance and replacement of the low-voltage active filter in the low-voltage active filter cabinet and insufficient heat dissipation efficiency by arranging an outer box body, a support frame, a limiting strip, a door panel and a soft exhaust sleeve.

[0006] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0007] The utility model discloses a low-voltage active filter cabinet, comprising an outer box body, a support frame, a limiting strip, a door panel and a soft exhaust sleeve, wherein the rear side of the outer box body is fixedly connected with the soft exhaust sleeve, the front side of the outer box body is symmetrically provided with a door panel, two ventilation nets are fixed through the door panel, and the ventilation nets in the same door panel are symmetrically arranged along the inner transverse center line of the door panel, a support frame is fixed to the lower part of the outer box body, a limiting strip is provided on the front side of the top of the support frame, and a plug-in plate is symmetrically fixed to the bottom of the limiting strip, and the plug-in plate is plugged into the support frame. When working, the support frame is fixed therein through the outer box body, a low-voltage active filter to be placed in the outer box body is supported by the support frame, the position of the low-voltage active filter on the support frame is limited by the limiting strip, the position of the low-voltage active filter on the support frame is limited by the limiting strip, the front side of the outer box body is closed by the door panel, and the air in the outer box body is discharged to the exhaust device through the soft exhaust sleeve.

[0008] Furthermore, an exhaust port is opened through the center of the rear side of the outer box body, and the exhaust port is connected to a soft exhaust sleeve. A flexible wire tube is fixed through a corner near the lower part of the rear side of the outer box body. When the outer box body is working, it is connected to the soft exhaust sleeve through the exhaust port, and the wires on the low-voltage active filter are guided to the external circuit through the flexible wire tube.

[0009] Furthermore, the support frame is arranged to be through-through from top to bottom, and three support cross bars are fixed inside the support frame, the support cross bars are parallel to the short sides of the support frame, and the support frame auxiliaryly supports the low-voltage active filter on the support frame through the support cross bars.

[0010] Furthermore, a socket is symmetrically provided in the front portion of the support frame, the plug board is inserted into the socket, and the support frame is movably connected to the plug board via the socket.

[0011] Furthermore, two fixed hinges are fixed on the sides of the two door panels that are away from each other, and the rear parts of the fixed hinges on the two door panels are respectively fixed to the front parts of the two sides of the outer box body, and a pulling handle is fixed in the middle of the edges of the front sides of the two door panels that are close to each other. The door panels are rotatably connected to the outer box body through the fixed hinges, and the door panels are opened and closed by pushing and pulling the pulling handles.

[0012] Furthermore, a mounting bracket is fixed to one end of the soft exhaust sleeve away from the outer box body, and mounting holes are formed at four corners of the mounting bracket. The soft exhaust sleeve is movably connected to the mounting bolts through the mounting holes on the mounting bracket, and is screwed into the installation position of the exhaust device through the mounting bolts and tightened, so that when working, the air in the soft exhaust sleeve is discharged into the exhaust device.

[0013] The utility model has the following beneficial effects:

[0014] The utility model solves the problem of inconvenient removal, maintenance and reinstallation of the low-voltage active filter in the low-voltage active filter cabinet by arranging an outer box body, a support frame and a limiting strip. During maintenance, the limiting strip is directly pulled upwards, and the plug plate is pulled out from the socket on the support frame, and the low-voltage active filter can be pulled, and the low-voltage active filter is removed from the support frame. After maintenance, it is put back on the top of the supporting cross bar in the support frame, and after resetting the limiting strip, the restriction of the low-voltage active filter is completed, so that the removal and maintenance of the low-voltage active filter is more convenient, and the reinstallation can be conveniently performed.

[0015] The utility model solves the problem that the heat dissipation efficiency of the low-voltage active filter cabinet is not high enough by arranging an outer box body, a door panel and a soft exhaust sleeve. When working, the air inlet position of the low-voltage active filter is arranged toward the door panel, so that after the air enters the outer box body through the ventilation net on the door panel, it is sucked into the low-voltage active filter and then discharged into the soft exhaust sleeve. The air discharged from the low-voltage active filter is output through the soft exhaust sleeve, so that when working, the heat dissipation effect of the low-voltage active filter can be well maintained under the protection of the door panel and the outer box body, so that when working, the heat dissipation efficiency of the low-voltage active filter cabinet is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a partially cutaway structural stereogram of a low-voltage active filter cabinet;

[0018] Figure 2 It is a three-dimensional diagram of the outer box structure;

[0019] Figure 3 It is a three-dimensional diagram of the support frame structure;

[0020] Figure 4 It is a three-dimensional diagram of the restriction strip structure;

[0021] Figure 5 The three-dimensional diagram of the door panel structure;

[0022] Figure 6 It is a three-dimensional diagram of the soft exhaust sleeve structure;

[0023] Figure 7 This is a three-dimensional diagram of the assembly structure of a low-voltage active filter cabinet.

[0024] Reference numerals:

[0025] 1. Outer box; 101. Exhaust port; 102. Flexible wire tube; 2. Support frame; 201. Support bar; 202. Socket; 3. Limiting strip; 301. Plug plate; 4. Door panel; 401. Pull handle; 402. Ventilation net; 403. Fixed hinge; 5. Soft exhaust cover; 501. Mounting frame; 502. Mounting hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0027] See also Figure 1-7 The utility model is a low-voltage active filter cabinet, comprising an outer box body 1, a support frame 2, a limiting strip 3, a door panel 4 and a soft exhaust sleeve 5. The rear side of the outer box body 1 is fixedly connected with the soft exhaust sleeve 5. When the outer box body 1 is working, the low-voltage active filter is accommodated therein, and the air exhausted from the low-voltage active filter is output through the soft exhaust sleeve 5. The front side of the outer box body 1 is symmetrically provided with a door panel 4. The front side of the outer box body 1 is open, and the front side of the outer box body 1 is closed by the door panel 4. Two ventilation nets 402 are fixed through the door panel 4, and air can enter the outer box body 1 through the ventilation nets 402. When working, the air inlet position of the low-voltage active filter is set toward the door panel 4, so that air passes through the door panel 4. After the ventilation net 402 enters the outer box body 1, it is sucked into the low-voltage active filter. The ventilation net 402 in the same door panel 4 is symmetrically arranged along the inner transverse center line of the door panel 4. A support frame 2 is fixed to the lower part of the outer box body 1, and the low-voltage active filter placed in the outer box body 1 is supported by the support frame 2. A limiting strip 3 is arranged on the front side of the top of the support frame 2. When working, the position of the low-voltage active filter placed on the support frame 2 is limited by the limiting strip 3 to prevent the low-voltage active filter from sliding to abut the door panel 4 when the outer box body 1 is moved. A plug plate 301 is symmetrically fixed to the bottom of the limiting strip 3, and the plug plate 301 is plugged into the support frame 2, so that the horizontal positions of the limiting strip 3 and the support frame 2 are determined.

[0028] Specifically, an exhaust port 101 is opened through the center of the rear side of the outer box body 1, and the exhaust port 101 is connected to the soft exhaust sleeve 5. A flexible wire tube 102 is fixed through a corner near the lower part of the rear side of the outer box body 1. The outer box body 1 transports the air used for heat dissipation of the low-voltage active filter into the soft exhaust sleeve 5 through the exhaust port 101, and guides the wires on the low-voltage active filter to the outside of the outer box body 1 through the flexible wire tube 102.

[0029] Furthermore, the support frame 2 is arranged to be through-through from top to bottom, and three support bars 201 are fixed inside the support frame 2. The support bars 201 are parallel to the short sides of the support frame 2. The support frame 2 is assisted by the support bars 201 so that the low-voltage active filter is suspended in the outer box 1.

[0030] Furthermore, a socket 202 is symmetrically provided in the front portion of the support frame 2 , and the plug board 301 is inserted into the socket 202 . The support frame 2 is movably connected to the plug board 301 via the socket 202 .

[0031] The operation process of this embodiment is as follows: during work, when placing the outer box body 1, the outer box body 1 is moved to a suitable position and then put down, then the door panel 4 is opened, and the limiting strip 3 is pulled upwards to make the plug plate 301 be pulled out from the socket 202 on the support frame 2, and then the low-voltage active filter is pushed onto the support frame 2 and supported by the supporting crossbar 201, and then the plug plate 301 at the bottom of the limiting strip 3 is aligned with the socket 202 on the support frame 2, and the plug plate 301 is inserted into the socket 202 to limit the position of the low-voltage active filter. During maintenance, the limiting strip 3 is directly pulled upwards to pull the plug plate 301 out of the socket 202 on the support frame 2, so that the low-voltage active filter can be pulled out and removed from the support frame 2. After maintenance, it is put back on the top of the supporting crossbar 201 in the support frame 2, and after resetting the limiting strip 3, the restriction of the low-voltage active filter is completed, making it more convenient to take out and maintain the low-voltage active filter. Specific embodiment 2

[0032] See also Figure 1 , 2 , 5, 6, on the basis of the specific embodiment 1, two fixed hinges 403 are fixed on the sides of the two door panels 4 that are away from each other, and the rear parts of the fixed hinges 403 on the two door panels 4 are respectively fixed to the front parts of the two sides of the outer box body 1, and a pulling handle 401 is fixed in the middle of the edges close to each other on the front sides of the two door panels 4. When the door panels 4 are working, they are rotatably connected to the outer box body 1 through the fixed hinges 403, and the door panels 4 are opened and closed at the front side of the outer box body 1 by pulling the pulling handle 401.

[0033] Specifically, a mounting bracket 501 is fixed to one end of the soft exhaust sleeve 5 away from the outer box body 1, and mounting holes 502 are formed at the four corners of the mounting bracket 501. The soft exhaust sleeve 5 is connected to the exhaust equipment through the mounting bracket 501. During installation, the mounting bracket 501 is aligned with the input end of the exhaust equipment, and the external mounting bolts are inserted into the mounting holes 502, and then screwed into the installation position outside the input end of the exhaust equipment. After tightening, the soft exhaust sleeve 5 and the exhaust equipment are installed together.

[0034] The operation process of this embodiment is as follows: during operation, after the soft exhaust sleeve 5 and the exhaust device are installed together, the door panel 4 allows air to enter the outer box body 1 through the ventilation net 402. During operation, the air inlet position of the low-voltage active filter is set toward the door panel 4, so that after the air enters the outer box body 1 through the ventilation net 402 on the door panel 4, it is sucked into the low-voltage active filter and then discharged into the soft exhaust sleeve 5. The air exhausted from the low-voltage active filter is output through the soft exhaust sleeve 5, so that during operation, the heat dissipation effect of the low-voltage active filter can be well maintained while being protected by the door panel 4 and the outer box body 1.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A low-voltage active filter cabinet, comprising an outer box (1), a support frame (2), a limiting strip (3), a door panel (4) and a soft exhaust sleeve (5), characterized in that: The rear side of the outer box body (1) is fixedly connected to a soft exhaust sleeve (5), the front side of the outer box body (1) is symmetrically provided with a door panel (4), two ventilation nets (402) are fixedly passed through the door panel (4), and the ventilation nets (402) in the same door panel (4) are symmetrically arranged along the inner transverse center line of the door panel (4), a support frame (2) is fixedly provided at the lower part of the inner part of the outer box body (1), a limiting strip (3) is provided at the front side of the top of the supporting frame (2), and an inserting plate (301) is symmetrically fixed at the bottom of the limiting strip (3), and the inserting plate (301) is inserted into the supporting frame (2).

2. A low voltage active filter cabinet according to claim 1, characterized in that: An exhaust port (101) is provided through the center of the rear side of the outer box body (1), the exhaust port (101) is communicated with the soft exhaust sleeve (5), and a flexible wire tube (102) is fixed through a corner near the lower part of the rear side of the outer box body (1).

3. A low voltage active filter cabinet according to claim 1, characterized in that: The support frame (2) is arranged to penetrate from top to bottom, and three support cross bars (201) are fixed inside the support frame (2), and the support cross bars (201) and the short sides of the support frame (2) are parallel to each other.

4. A low voltage active filter cabinet according to claim 1, characterized in that: A socket (202) is symmetrically provided in the front portion of the support frame (2), and the plug board (301) is inserted into the socket (202).

5. A low voltage active filter cabinet according to claim 1, characterized in that: Two fixed hinges (403) are fixed on the sides of the two door panels (4) that are away from each other, the rear parts of the fixed hinges (403) on the two door panels (4) are respectively fixed to the front parts of the two sides of the outer box body (1), and a pulling handle (401) is fixed in the middle of the edges of the front sides of the two door panels (4) that are close to each other.

6. A low voltage active filter cabinet according to claim 1, characterized in that: A mounting frame (501) is fixed to one end of the flexible exhaust sleeve (5) away from the outer box body (1), and mounting holes (502) are provided through the four corners of the mounting frame (501).

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