Protection device of three-phase frequency converter

Abstract

The utility model discloses a protection device of a three-phase frequency converter, which belongs to the field of three-phase frequency converters and comprises a box body and a sealing door rotationally connected with the box body, a filter screen is arranged at the outer end of the sealing door, and a dust removal assembly located in the box body is fixedly connected to the outer end of the sealing door. According to the scheme, the driving plate is driven to move in the gas conveying pipe in the direction close to the rotating disc, so that gas in the gas conveying pipe is extruded out through the multiple gas outlet holes and acts on the filter screen, and therefore the gas in the gas conveying pipe can be filtered out; and meanwhile, the pressurizing assembly located in the air conveying pipe is arranged, in the moving process of the driving plate, the air bag expands, the air pressure in the air conveying pipe is increased, and therefore the impact force of air flowing out of the air outlet holes is improved, and the dust removal effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of three-phase frequency converters, and more specifically, to a protection device for three-phase frequency converters. Background Art

[0002] The three-phase inverter is a power electronic device that realizes the speed regulation, start / stop, and reversal control functions of the AC motor by adjusting the power supply voltage, frequency, power and other parameters. It is mainly composed of a rectifier, filter, inverter, etc., and can be selected and adjusted according to the characteristics of different motors and the working environment, so as to achieve the purpose of precise control of the motor.

[0003] The outer end of the three-phase inverter cabinet is generally equipped with a filter, which can ensure the normal circulation of gas inside the cabinet and the outside air. While effectively dissipating heat, it can also prevent impurities and dust in the air from entering the cabinet. However, after the three-phase inverter has been running for a long time, some impurities and dust filtered out will adhere to the outer surface of the filter, causing the mesh of the filter to become clogged, affecting the normal circulation of gas inside the cabinet and the outside air.

[0004] Therefore, a protection device for a three-phase frequency converter is proposed to solve some problems existing in the above-mentioned prior art. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a protection device for a three-phase inverter, which is characterized in that a dust removal component is provided, and a driving plate is driven to move in the direction close to the turntable inside the gas pipe, so that the gas inside the gas pipe is squeezed out through multiple air outlets and acts on the filter screen, thereby achieving the effect of flushing impurities and dust on the outer surface of the filter screen. At the same time, a pressurizing component is provided inside the gas pipe. During the movement of the driving plate, the airbag is expanded to increase the air pressure inside the gas pipe, thereby increasing the impact force of the gas flowing out of the air outlet and improving the dust removal effect.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] A protective device for a three-phase frequency converter comprises a box body and a sealing door rotatably connected thereto, wherein a filter screen is arranged at the outer end of the sealing door, a dust removal assembly located inside the box body is fixedly connected to the outer end of the sealing door, a driving assembly is arranged at the outer end of the dust removal assembly, and a pressurizing assembly is arranged inside the dust removal assembly.

[0010] 3. Beneficial effects

[0011] Compared with the prior art, the advantages of the present invention are:

[0012] (1) This solution sets up a dust removal component, which drives the driving plate to move in the direction close to the turntable inside the gas pipe, so that the gas inside the gas pipe is squeezed out through multiple air outlets and acts on the filter screen, thereby achieving the effect of flushing impurities and dust on the outer surface of the filter screen. At the same time, when the driving plate moves, the turntable will also rotate, so that multiple can be used more comprehensively.

[0013] (2) This solution sets up a pressurizing component located inside the gas pipe. During the movement of the driving plate, the air bag is expanded to increase the air pressure inside the gas pipe, thereby increasing the impact force of the gas flowing out of the air outlet and improving the dust removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 For this application, look at the structural diagram;

[0015] Figure 2 This is a schematic diagram of the dust removal component structure for this application;

[0016] Figure 3 For this application Figure 2 Schematic diagram of the enlarged structure of the middle A area;

[0017] Figure 4 This is a schematic diagram of the internal structure of the gas pipeline for this application;

[0018] Figure 5 This is a schematic diagram of the pressurized component structure of this application.

[0019] Description of the numbers in the figure:

[0020] 1. Box body; 2. Sealing door; 3. Filter; 4. Air pipe; 5. Drive plate; 6. Drive rod; 7. Annular groove; 8. Annular block; 9. Ball; 10. Turntable; 11. Air outlet; 12. Pointed nozzle; 13. Pressurizing component; 14. Air storage pipe; 15. Push rod; 16. Air bag. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Example 1

[0025] See also Figure 1-5 A protective device for a three-phase frequency converter comprises a box body 1 and a sealing door 2 rotatably connected thereto, a filter screen 3 is arranged at the outer end of the sealing door 2, a dust removal component located inside the box body 1 is fixedly connected to the outer end of the sealing door 2, a driving component is arranged at the outer end of the dust removal component, and a pressurizing component 13 is arranged inside the dust removal component.

[0026] See also Figure 4 The dust removal component includes an air pipe 4 that is compatible with the filter screen 3. A threaded groove is provided on the inner wall of the air pipe 4. A driving plate 5 is slidably connected in the threaded groove. A turntable 10 is rotatably connected inside the air pipe 4. A cross bar is provided at one end of the turntable 10 close to the driving plate 5. The cross bar is eccentrically arranged with respect to the center position of the turntable 10, and at the same time passes through the driving plate 5 and is slidably connected to the driving plate 5, so that the driving plate 5 can also drive the turntable 10 to rotate during the movement. A plurality of air outlet holes 11 are provided at the outer end of the turntable 10.

[0027] See also Figure 3 The driving assembly includes a driving rod 6 located on the side of the driving plate 5 away from the sealing door 2. An annular groove 7 is provided at the outer end of the driving rod 6. An annular block 8 fixedly connected to the driving plate 5 is rotatably connected inside the annular groove 7. A ball 9 that abuts against the driving plate 5 is rotatably connected to the end of the driving rod 6 close to the driving plate 5.

[0028] See also Figure 4 The driving rod 6 includes a front rod and a rear rod, the front rod is rotatably connected to the rear rod, and the front rod is located inside the gas pipe 4.

[0029] Example 2

[0030] The utility model provides a protection device for a three-phase frequency converter, wherein the components identical or corresponding to those in Embodiment 1 are marked with the corresponding reference numerals in Embodiment 1. For the sake of simplicity, only the differences from Embodiment 1 are described below. Figure 5 The pressurizing assembly 13 includes an air storage pipe 14 fixedly connected to the inner wall of the air delivery pipe 4, a push rod 15 is slidably connected to the inner wall of the air storage pipe 14, and an air bag 16 communicating with the air storage pipe 14 is arranged at the lower end.

[0031] See also Figure 1 A pointed nozzle 12 matched with the air outlet 11 is arranged at one end of the turntable 10 close to the filter screen 3 , and the tip of the pointed nozzle 12 faces the filter screen 3 .

[0032] Working principle: when it is necessary to remove impurities on the outer surface of the filter 3, the user first opens the sealing door 2, and then uses the driving rod 6 to drive the driving plate 5 to move inside the gas pipe 4 toward the direction close to the turntable 10, so that the gas inside the gas pipe 4 is squeezed out through the multiple air outlet holes 11 and acts on the filter 3, so as to achieve the effect of flushing impurities and dust on the outer surface of the filter 3. Since the driving plate 5 is threadedly connected to the gas pipe 4, the driving plate 5 will also drive the turntable 10 to rotate during the movement of the driving plate 5, so that the multiple air outlet holes 11 can flush the filter 3 in multiple directions. At the same time, a pressurizing component 13 is provided inside the gas pipe 4. During the movement of the driving plate 5, the push rod 15 will be driven to squeeze the gas inside the gas storage pipe 14 into the air bag 16 to expand it, thereby increasing the air pressure inside the gas pipe 4, increasing the impact force of the gas flowing out of the air outlet holes 11, and improving the dust removal effect.

[0033] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A protection device for a three-phase frequency converter, comprising a housing (1) and a sealing door (2) rotatably connected thereto, characterized in that: The outer end of the sealing door (2) is provided with a filter screen (3), the outer end of the sealing door (2) is fixedly connected to a dust removal component located inside the box (1), the outer end of the dust removal component is provided with a drive component, and the interior of the dust removal component is provided with a pressurizing component (13).

2. The protection device for a three-phase frequency converter according to claim 1, characterized in that: The dust removal component comprises an air pipe (4) adapted to the filter screen (3), the inner wall of the air pipe (4) being provided with a threaded groove, a driving plate (5) being slidably connected in the threaded groove, a turntable (10) being rotatably connected inside the air pipe (4), and a plurality of air outlet holes (11) being provided at the outer end of the turntable (10).

3. The protection device for a three-phase frequency converter according to claim 1, characterized in that: The driving assembly comprises a driving rod (6) located on a side of the driving plate (5) away from the sealing door (2); an annular groove (7) is provided at the outer end of the driving rod (6); an annular block (8) fixedly connected to the driving plate (5) is rotatably connected inside the annular groove (7); and a ball (9) abutting against the driving plate (5) is rotatably connected to one end of the driving rod (6) close to the driving plate (5).

4. The protection device for a three-phase frequency converter according to claim 3, characterized in that: The driving rod (6) comprises a front rod and a rear rod, the front rod is rotatably connected to the rear rod, and the front rod is located inside the gas delivery pipe (4).

5. The protection device for a three-phase frequency converter according to claim 1, characterized in that: The pressurizing component (13) comprises an air storage pipe (14) fixedly connected to the inner wall of the air delivery pipe (4), a push rod (15) being slidably connected to the inner wall of the air storage pipe (14), and an air bag (16) communicating with the air storage pipe (14) being arranged at the lower end.

6. The protection device for a three-phase frequency converter according to claim 2, characterized in that: A pointed nozzle (12) matched with the air outlet (11) is arranged at one end of the test turntable (10) close to the filter screen (3), and the tip of the pointed nozzle (12) faces the filter screen (3).

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