Protective device for adding coating on arcing part of frequency converter power supply

Abstract

The utility model relates to the technical field of frequency converters, and particularly discloses a frequency converter power supply arcing portion coating protection device comprising a lower clamping plate and an upper clamping plate, the lower clamping plate is connected with the upper clamping plate through an elastic pressure applying mechanism, the bottom of the upper clamping plate is provided with a cavity, and the center of the top of the cavity is provided with a through hole penetrating through the upper clamping plate. An isolating membrane is attached to the inner wall of the cavity, a glue injection pipe is embedded in the through hole, and a frequency converter power supply card is arranged between the lower clamping plate and the upper clamping plate. According to the technical scheme, the lower clamping plate and the upper clamping plate are matched with the elastic pressure applying mechanism, so that the lower clamping plate and the upper clamping plate are elastically clamped in the arc discharge area of the frequency converter power supply card, hot melt glue is injected into the cavity through the glue injection pipe by utilizing the glue injection gun, and an insulating protection layer is formed on the surface of the arc discharge area after the hot melt glue is cooled; and the problem of board burning caused by short circuit due to discharge arcing between direct-current positive and negative electrodes of the frequency converter power supply card is thoroughly solved.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, in particular to a coating protection device for adding a karaoke arc part to a frequency converter power supply. Background Art

[0002] The damaged location of the inverter is basically a short circuit and arcing near the input and output terminals of the power card, which causes damage to the inverter. The preliminary analysis shows that when the dust inside the inverter accumulates to a certain amount, condensation occurs at night when there is no production, causing discharge and arcing between the positive and negative DC of the inverter. The following measures are first taken: the parameters of the inverter being used on site are adjusted, and the fan control is changed to 100% operation. This can reduce the occurrence of condensation, but it cannot completely solve the problem of short circuit and burning of the board due to arcing between the positive and negative DC of the inverter power card. Therefore, we propose a coating protection device to be added to the arcing part of the inverter power card. Utility Model Content

[0003] The purpose of the utility model is to provide a coating protection device for the arcing part of a frequency converter power supply, thereby solving the problems raised in the background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coating protection device is added to the arc part of the inverter power card, comprising a lower splint and an upper splint, the lower splint is connected to the upper splint by an elastic pressure mechanism, a cavity is opened at the bottom of the upper splint, a through hole is opened at the center of the top of the cavity and passes through the upper splint, an isolation membrane is applied to the inner wall of the cavity, a glue injection tube is embedded in the through hole, and an inverter power card is arranged between the lower splint and the upper splint.

[0005] Furthermore, the elastic pressure mechanism includes two threaded columns fixed to the surface of the lower splint, both threaded columns pass through the upper splint, the top of the threaded column is threadedly connected to a nut, and a spring is embedded in the middle of the threaded column, and the spring is located between the nut and the upper splint.

[0006] Furthermore, the nut includes a butterfly nut and a retaining ring fixed to the bottom of the butterfly nut.

[0007] Furthermore, the top end of the glue injection tube penetrates the isolation membrane and passes through the through hole, and the outer ring of the bottom end of the glue injection tube is integrally formed with a retaining ring.

[0008] Furthermore, a soft pad is fixedly provided on the top surface of the lower splint.

[0009] Furthermore, the inverter power card includes a power card and an arc-drawing area, a horizontal cross-section of the cavity is vertically aligned with the arc-drawing area, and a thickness of the cavity is 3 mm to 5 mm.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] 1. The technical solution of the present application uses a lower clamping plate and an upper clamping plate in conjunction with an elastic pressure mechanism, so that the lower clamping plate and the upper clamping plate are elastically clamped in the arcing area of the inverter power card, and a glue injection gun is used to inject hot melt glue into the cavity through the glue injection tube. After the hot melt glue cools, an insulating protective layer is formed on the surface of the arcing area, which completely solves the problem of short circuit and burning of the board caused by discharge and arcing between the positive and negative DC of the inverter power card.

[0012] 2. The technical solution of the present application adjusts the pressure value of the spring through a nut, so that the lower and upper clamping plates can adapt to the thickness of the inverter power card and clamp it, so that the hot melt adhesive injected into the cavity fits tightly with the arc drawing area. By setting an isolation membrane, the upper clamping plate is easily separated from the solidified hot melt adhesive, and the device can be recycled later. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a three-dimensional view of a coating protection device added to the arcing part of the inverter power supply of the utility model;

[0015] Figure 2 Adding a coating protection device to the arcing area to clamp the main view of the inverter power card;

[0016] Figure 3 is a cross-sectional view of the upper splint;

[0017] Figure 4 This is a structural diagram of the inverter power card.

[0018] In the figure: 1. Lower splint; 101. Cushion; 2. Upper splint; 201. Cavity; 202. Through hole; 3. Glue injection tube; 301. Retaining ring; 4. Nut; 401. Butterfly nut; 402. Retaining ring; 5. Spring; 6. Threaded column; 7. Inverter power card; 701. Arcing area; 8. Isolation membrane. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1, as Figure 1-4As shown, the utility model provides a technical solution: a coating protection device is added to the arc part of the inverter power card, including a lower splint 1 and an upper splint 2, the lower splint 1 is connected to the upper splint 2 by an elastic pressure mechanism, a cavity 201 is provided at the bottom of the upper splint 2, a through hole 202 is provided at the top center of the cavity 201, an isolation membrane 8 is affixed to the inner wall of the cavity 201, a glue injection tube 3 is embedded in the through hole 202, and an inverter power card 7 is provided between the lower splint 1 and the upper splint 2.

[0021] In a specific embodiment of the present invention, all the welding feet of the arcing area 701 of the inverter power card 7 are cut short, and the inverter power card 7 is cleaned with alcohol. After the alcohol is dry, the inverter power card 7 is clamped between the lower clamping plate 1 and the upper clamping plate 2, and the cavity 201 is vertically aligned with the arcing area 701. At this time, the rebound force of the spring 5 makes the lower clamping plate 1 and the upper clamping plate 2 clamp the inverter power card 7. The rebound force of the spring 5 can be adjusted by rotating the nut 4, and the isolation membrane 8 is used to isolate the cavity 201 from the hot melt adhesive. The hot melt adhesive is in the glue gun, and the nozzle of the glue gun is aligned with the glue injection tube 3. Then the hot melt adhesive is filled into the cavity 201 through the glue injection tube 3, so that the hot melt adhesive is in close contact with the arcing area 701. After a period of cooling, the hot melt adhesive forms an insulating protective layer on the surface of the arcing area 701, which is used to protect the welding feet of the arcing area 701 from being affected by condensation. Then remove the device and tear off the isolation film 8 adhered to the surface of the hot melt adhesive.

[0022] In the preferred technical solution, the elastic pressure mechanism includes two threaded columns 6 fixed on the surface of the lower clamping plate 1, and both threaded columns 6 pass through the upper clamping plate 2. The top of the threaded column 6 is threadedly connected to a nut 4, and a spring 5 is embedded in the middle of the threaded column 6. The spring 5 is located between the nut 4 and the upper clamping plate 2. The nut 4 includes a butterfly nut 401 and a retaining ring 402 fixed to the bottom of the butterfly nut 401. The rebound force of the spring 5 enables the lower clamping plate 1 and the upper clamping plate 2 to clamp the inverter power card 7. The butterfly nut 401 is convenient for rotation and adjustment, and the retaining ring 402 is used to resist the top of the spring 5.

[0023] In the preferred technical solution, the top of the injection tube 3 penetrates the isolation membrane 8 and passes through the through hole 202. The outer ring of the bottom end of the injection tube 3 is integrally formed with a retaining ring 301. The retaining ring 301 is used to support the injection tube 3 to prevent the injection tube 3 from being easily pulled out from above the through hole 202.

[0024] In the preferred technical solution, a soft pad 101 is fixedly provided on the top surface of the lower clamping plate 1. The soft pad 101 is used to isolate the lower clamping plate 1 from the inverter power card 7 and plays a role of buffer protection.

[0025] In the preferred technical solution, the inverter power card 7 includes a power card and an arcing area 701. The horizontal cross-section of the cavity 201 is vertically aligned with the arcing area 701. The thickness of the cavity 201 is 5 mm. The thickness of the cavity 201 is the thickness of the last insulating layer to avoid excessive thickness affecting the installation of the inverter power card 7.

[0026] To sum up: by cooperating with the elastic pressure mechanism, the lower splint 1 and the upper splint 2 are elastically clamped in the arcing area 701 of the inverter power card 7, and the hot melt glue is injected into the cavity 201 through the glue injection tube 3 using a glue gun. After the hot melt glue cools, an insulating protective layer is formed on the surface of the arcing area 701, which completely solves the problem of short circuit and burning of the board caused by discharge and arcing between the positive and negative DC of the inverter power card.

Claims

1. A coating protection device is added to the arcing part of the inverter power supply, characterized by: The invention comprises a lower splint (1) and an upper splint (2), wherein the lower splint (1) is connected to the upper splint (2) via an elastic pressure mechanism, a cavity (201) is provided at the bottom of the upper splint (2), a through hole (202) penetrating the upper splint (2) is provided at the top center of the cavity (201), an isolation membrane (8) is applied to the inner wall of the cavity (201), a glue injection tube (3) is embedded in the through hole (202), and an inverter power card (7) is provided between the lower splint (1) and the upper splint (2).

2. The inverter power supply arcing part according to claim 1 is provided with a coating protection device, characterized in that: The elastic pressure mechanism comprises two threaded columns (6) fixed on the surface of the lower clamping plate (1), the two threaded columns (6) both pass through the upper clamping plate (2), the top ends of the threaded columns (6) are threadedly connected to a nut (4), the middle of the threaded columns (6) is embedded with a spring (5), and the spring (5) is located between the nut (4) and the upper clamping plate (2).

3. The inverter power supply arcing part according to claim 2 is provided with a coating protection device, characterized in that: The nut (4) comprises a butterfly nut (401) and a retaining ring (402) fixed to the bottom of the butterfly nut (401).

4. The inverter power supply arcing part according to claim 1 is provided with a coating protection device, characterized in that: The top end of the glue injection tube (3) penetrates the isolation membrane (8) and passes through the through hole (202), and the outer ring of the bottom end of the glue injection tube (3) is integrally formed with a retaining ring (301).

5. The inverter power supply arcing part according to claim 1 is provided with a coating protection device, characterized in that: A soft pad (101) is fixedly provided on the top surface of the lower splint (1).

6. The inverter power supply arcing part according to claim 1 is provided with a coating protection device, characterized in that: The inverter power card (7) comprises a power card and an arcing area (701), a horizontal cross section of the cavity (201) is vertically aligned with the arcing area (701), and a thickness of the cavity (201) is 3 mm to 5 mm.

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