Protection device for high-voltage frequency converter

Abstract

The utility model provides a protection device for a high-voltage frequency converter, which is arranged on a frequency converter device, two ventilation openings are further arranged above the frequency converter device, the protection device comprises two protection assemblies, the two protection assemblies are connected through a supporting plate, and sealing frames are arranged at the bottoms of the two protection assemblies. The sealing frame is connected with the frequency converter device through the two connecting assemblies, dust in airflow entering the frequency converter device is preliminarily filtered by arranging the first filter screen, the connecting frame and the input frame are arranged, and the cross section of the connecting frame is arc-shaped, so that the dust in the airflow entering the connecting frame through the input frame is effectively filtered, and the dust in the airflow entering the frequency converter device is effectively filtered. The bent connecting frame increases the path length before airflow enters the frequency converter, so that part of dust can be deposited on the wall of the pipeline when the dust in the airflow passes through the pipeline, the amount of the dust entering the frequency converter is greatly reduced, the operation of the whole equipment is smoother, and the service life of the whole equipment is prolonged to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage frequency converters, in particular to a protection device for high-voltage frequency converters. Background Art

[0002] A high-voltage inverter is an electrical energy control device primarily used to change the output frequency and voltage, thereby controlling the speed of AC high-voltage motors. It utilizes the on-off function of power semiconductor devices to convert industrial frequency power to another frequency. It is primarily used to regulate the speed of high-voltage motors, achieving speed control. The operating principle of a high-voltage inverter is to convert input AC power into DC power, which is then inverted through electronic components into adjustable-frequency AC power. Its core component is a power transistor, which switches electrical energy on and off at extremely high speeds, thereby regulating the output frequency.

[0003] Existing high-voltage inverters usually include an inverter body, a cooling fan is usually provided inside the inverter, and a vent is provided above the inverter. The position of the vent is connected to the position of the cooling fan, which plays a role in dissipating heat for the entire device, completing the protection of the device during use and ensuring the stability of the device. However, during the use of existing equipment, when in a dusty environment, since the inverter adopts an air intake cooling method, this method will inhale dust and impurities in the air into the inverter, so that the dust will affect the operation of the entire device.

[0004] Therefore, it is necessary to provide a new protection device for high-voltage frequency converter to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a protection device for a high-voltage frequency converter.

[0006] The utility model provides a protective device for a high-voltage frequency converter, which is arranged on the frequency converter device. Two vents are also provided above the frequency converter device. The device includes two protective components, which are connected by a support plate. A sealing frame is provided at the bottom of the two protective components, and the sealing frame is connected to the frequency converter device through two connecting components.

[0007] The protection component includes a connecting frame, an input frame and a first filter. One end of the connecting frame is fixedly connected to the sealing frame. The cross-section of the connecting frame is arranged to be arc-shaped. The end of the connecting frame away from the sealing frame is fixedly connected to one end of the input frame. The first filter is fixedly arranged inside the input frame. The first filter is inclined from the upper end edge of the first filter to the outer wall edge of the input frame.

[0008] Preferably, the connecting assembly includes a mounting block, a limiting rod and a locking block, the upper end of the mounting block is fixedly connected to the bottom end of the sealing frame, the end of the mounting block away from the sealing frame extends into the positioning groove provided on the inverter device, one end of the limiting rod is fixedly connected to the inner side of the positioning groove, the end of the limiting rod away from the positioning groove passes through the mounting block, and the end of the limiting rod close to the mounting block is provided with a locking groove, one end of the locking block extends into the locking groove, the end of the locking block close to the locking groove is fixedly connected to a spring, one end of the spring is fixedly connected to the inner side of the locking groove, and the bottom end of the locking block is fitted with the upper end of the sealing frame.

[0009] Preferably, a second filter is provided at the vent position, and connecting plates are fixedly connected to the opposite sides of the second filter. Both connecting plates extend into the placement grooves provided on the inverter device, and the upper ends of the two connecting plates are fixedly connected to pull rings.

[0010] Preferably, the inverter device includes an inverter body and a heat dissipation fan, the heat dissipation fan is arranged inside the inverter body, and the bottom end of the sealing frame is in contact with the upper end of the inverter body.

[0011] Preferably, heat dissipation holes are provided on opposite sides of the inverter body.

[0012] Preferably, one side edge of the engaging block is configured to be in an arc shape.

[0013] Compared with related technologies, the protection device for high-voltage inverter provided by the present invention has the following beneficial effects:

[0014] During use of the device, a first filter is provided to perform preliminary filtration on the dust in the airflow entering the inverter device, and a connecting frame and an input frame are provided, and the cross-section of the connecting frame is set to an arc shape, so that in the process of the airflow passing through the input frame and entering the connecting frame, the bent connecting frame increases the path length of the airflow before entering the inverter, so that when the dust in the airflow passes through the pipe, part of the dust will be deposited on the pipe wall, which greatly reduces the amount of dust entering the interior of the inverter, makes the operation of the overall equipment smoother, and improves the service life of the overall equipment to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the protection device for high-voltage frequency converter provided by the utility model;

[0016] Figure 2 A partial schematic diagram of the protection device for a high-voltage frequency converter provided by the present utility model;

[0017] Figure 3 A partial exploded view of the protection device for a high-voltage frequency converter provided by the present invention;

[0018] Figure 4 A top view of the inverter main body provided by the utility model;

[0019] Figure 5 A cross-sectional view of the limiting rod provided by the utility model;

[0020] Figure 6 This is a schematic diagram of the protection component provided by the utility model.

[0021] Numbers in the figure: 1. Inverter body; 2. Connection frame; 3. Input frame; 4. First filter; 5. Heat dissipation hole; 6. Support plate; 7. Sealing frame; 8. Second filter; 9. Connection plate; 10. Pull ring; 11. Limit rod; 12. Cooling fan; 13. Clamping block; 14. Spring; 15. Mounting block. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0023] Please refer to Figures 1-6 ,in, Figure 1 This is a schematic diagram of the overall structure of the protection device for high-voltage frequency converter provided by the utility model; Figure 2 A partial schematic diagram of the protection device for a high-voltage frequency converter provided by the present utility model; Figure 3 A partial exploded view of the protection device for a high-voltage frequency converter provided by the present invention; Figure 4 A top view of the inverter main body provided by the utility model; Figure 5 A cross-sectional view of the limiting rod provided by the utility model; Figure 6 This is a schematic diagram of the protection component provided by the utility model.

[0024] In the specific implementation process, Figures 1-6 As shown, a protective device for a high-voltage frequency converter is provided on the frequency converter device. Two vents are also provided above the frequency converter device. The device includes two protective components, which are connected by a support plate 6. A sealing frame 7 is provided at the bottom of the two protective components. The sealing frame 7 is connected to the frequency converter device via two connecting components.

[0025] The protection assembly includes a connecting frame 2, an input frame 3, and a first filter 4. One end of the connecting frame 2 is fixedly connected to the sealing frame 7. The cross-section of the connecting frame 2 is arranged in an arc shape. The end of the connecting frame 2 away from the sealing frame 7 is fixedly connected to one end of the input frame 3. The first filter 4 is fixedly arranged inside the input frame 3. The first filter 4 is arranged to be inclined from the upper end edge of the first filter 4 to the outer wall edge of the input frame 3.

[0026] During specific use, by setting the first filter 4, the dust in the airflow entering the inverter device is preliminarily filtered, and by setting the connecting frame 2 and the input frame 3, the cross-section of the connecting frame 2 is set to an arc shape, so that when the airflow passes through the input frame 3 and enters the connecting frame 2, the bent connecting frame 2 increases the path length of the airflow before entering the inverter, so that when the dust in the airflow passes through the pipe, part of the dust will be deposited on the pipe wall, which greatly reduces the amount of dust entering the interior of the inverter, making the operation of the entire device smoother and improving the service life of the entire device to a certain extent;

[0027] The connecting assembly includes a mounting block 15, a limiting rod 11 and a locking block 13. The upper end of the mounting block 15 is fixedly connected to the bottom end of the sealing frame 7. The end of the mounting block 15 away from the sealing frame 7 extends into the positioning groove provided on the inverter device. One end of the limiting rod 11 is fixedly connected to the inner side of the positioning groove. The end of the limiting rod 11 away from the positioning groove passes through the mounting block 15. The end of the limiting rod 11 close to the mounting block 15 is provided with a locking groove. One end of the locking block 13 extends into the locking groove. The end of the locking block 13 close to the locking groove is fixedly connected to a spring 14. One end of the spring 14 is fixedly connected to the inner side of the locking groove. The bottom end of the locking block 13 is fitted with the upper end of the sealing frame 7, and one side edge of the locking block 13 is set to an arc shape.

[0028] During use, when the sealing frame 7 needs to be removed, the engaging block 13 can be pushed toward the direction close to the limiting rod 11. When the engaging block 13 is completely inserted into the limiting rod 11, the sealing frame 7 and the limiting rod 11 can be separated. The disassembled sealing frame 7, the two connecting frames 2, and the two input frames 3 are more convenient to clean.

[0029] When the sealing frame 7 needs to be installed, the limiting rod 11 is passed through the sealing frame 7. During this process, the arc-shaped side of the snap block 13 will first contact the mounting block 15 provided at the bottom of the sealing frame 7. The snap block 13 is squeezed by the mounting block 15 so that it enters the interior of the limiting rod 11. During the movement of the snap block 13, the spring 14 is compressed until the snap block 13 completely passes through the mounting block 15 and the sealing frame 7. At this time, the snap block 13 is ejected due to the pushing force of the spring 14, completing the fixation of the sealing frame 7.

[0030] A second filter screen 8 is provided at the vent position, and connecting plates 9 are fixedly connected to the opposite sides of the second filter screen 8. The two connecting plates 9 extend into the placement slots provided on the inverter device, and the upper ends of the two connecting plates 9 are fixedly connected to pull rings 10;

[0031] The second filter 8 is provided to further filter the dust in the airflow entering the inverter body 1, thereby further improving the filtering effect and protecting the smooth operation of the equipment.

[0032] The inverter device includes an inverter body 1 and a heat dissipation fan 12. The heat dissipation fan 12 is arranged inside the inverter body 1. The bottom end of the sealing frame 7 is in contact with the upper end of the inverter body 1. Heat dissipation holes 5 are provided on opposite sides of the inverter body 1.

[0033] The inverter body 1 mentioned above is a G120 inverter.

[0034] The working principle of the present invention is as follows: in specific use, by providing a first filter 4, dust in the airflow entering the inverter body 1 is initially filtered, and by providing a connecting frame 2 and an input frame 3, the cross section of the connecting frame 2 is set to an arc shape, so that when the airflow passes through the input frame 3 and enters the connecting frame 2, the bent connecting frame 2 increases the path length of the airflow before entering the inverter body 1, so that when the dust in the airflow passes through the pipe, some of the dust will be deposited on the pipe wall, greatly reducing the amount of dust entering the interior of the inverter;

[0035] The second filter 8 is provided to further filter the dust in the airflow entering the inverter body 1, thereby further improving the filtering effect and protecting the smooth operation of the equipment.

[0036] Regarding the disassembly and installation of the sealing frame 7, when the sealing frame 7 needs to be disassembled, the engaging block 13 can be pushed toward the direction close to the limiting rod 11. When the engaging block 13 completely enters the interior of the limiting rod 11, the sealing frame 7 and the limiting rod 11 can be separated. The disassembled sealing frame 7, the two connecting frames 2, and the two input frames 3 are more convenient to clean.

[0037] When the sealing frame 7 needs to be installed, the limiting rod 11 is passed through the sealing frame 7. During this process, the arc-shaped side of the locking block 13 will first contact the mounting block 15 set at the bottom of the sealing frame 7. The locking block 13 is squeezed by the mounting block 15 to enter the interior of the limiting rod 11. During the movement of the locking block 13, the spring 14 is compressed until the locking block 13 completely passes through the mounting block 15 and the sealing frame 7. At this time, the locking block 13 will pop out due to the pushing force of the spring 14, completing the fixation of the sealing frame 7. The structure is simple and the operation is easy, making the maintenance and installation of the sealing frame 7, the two connecting frames 2 and the two input frames 3 more convenient.

[0038] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0039] The above description is merely 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 description 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 protective device for a high-voltage frequency converter, which is arranged on the frequency converter device, and two vents are arranged above the frequency converter device, characterized in that: It comprises two protection components, the two protection components are connected via a support plate (6), a sealing frame (7) is provided at the bottom of the two protection components, and the sealing frame (7) is connected to the frequency converter device via two connecting components; The protection component comprises a connection frame (2), an input frame (3) and a first filter (4); one end of the connection frame (2) is fixedly connected to the sealing frame (7); the cross section of the connection frame (2) is arranged in an arc shape; the end of the connection frame (2) away from the sealing frame (7) is fixedly connected to one end of the input frame (3); the first filter (4) is fixedly arranged inside the input frame (3); and the first filter (4) is arranged to be inclined from the upper end edge of the first filter (4) to the outer wall edge of the input frame (3).

2. The protection device for high-voltage frequency converter according to claim 1, characterized in that: The connecting assembly comprises a mounting block (15), a limiting rod (11) and a locking block (13); the upper end of the mounting block (15) is fixedly connected to the bottom end of the sealing frame (7); the end of the mounting block (15) away from the sealing frame (7) extends into a positioning groove provided on the frequency converter device; one end of the limiting rod (11) is fixedly connected to an inner side of the positioning groove; the end of the limiting rod (11) away from the positioning groove passes through the mounting block (15); an locking groove is provided at an end of the limiting rod (11) close to the mounting block (15); one end of the locking block (13) extends into the locking groove; the end of the locking block (13) close to the locking groove is fixedly connected to a spring (14); one end of the spring (14) is fixedly connected to an inner side of the locking groove; the bottom end of the locking block (13) is in contact with the upper end of the sealing frame (7).

3. The protection device for high-voltage frequency converter according to claim 2, characterized in that: A second filter screen (8) is provided at the vent position, and connecting plates (9) are fixedly connected to opposite sides of the second filter screen (8), and the two connecting plates (9) extend into placement slots provided on the frequency converter device, and the upper ends of the two connecting plates (9) are fixedly connected to pull rings (10).

4. The protection device for high-voltage frequency converter according to claim 3, characterized in that: The frequency converter device comprises a frequency converter body (1) and a heat dissipation fan (12), wherein the heat dissipation fan (12) is arranged inside the frequency converter body (1), and the bottom end of the sealing frame (7) is in contact with the upper end of the frequency converter body (1).

5. The protection device for high-voltage frequency converter according to claim 4, characterized in that: Heat dissipation holes (5) are provided on opposite sides of the frequency converter body (1).

6. The protection device for high-voltage frequency converter according to claim 5, characterized in that: One side edge of the engaging block (13) is arranged in an arc shape.

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