Low-voltage frequency converter aging test device

Abstract

The utility model discloses an aging test device for a low-voltage frequency converter, which relates to the technical field of frequency converters and comprises a test cabinet, the front side of the test cabinet is rotatably connected with a sealing door through a rotating shaft, the top of the sealing door is fixedly connected with a spraying disc, and the side surface of the spraying disc is communicated with a pipe body. According to the utility model, the top of the test cabinet is provided with the three groups of test knobs, the three groups of test knobs are sequentially connected to the frequency conversion cabinet through the wiring grooves, and the three test knobs are connected to different voltages, so that the aging time difference of the frequency conversion cabinet under different voltages can be tested, and accurate numerical values can be displayed through the display screen; the test mechanism is mounted on the inner side of a slide rail arranged at the bottom of the test cabinet, a rack mounted at the bottom of a test board in the test mechanism is in meshed connection with a gear on an output shaft of a driver, the driver drives the gear to rotate, a frequency conversion cabinet on the test board can be moved out of the test cabinet, and direct manual removal by testers is avoided. High temperature remains on the frequency conversion cabinet in the testing process, so that testing personnel can be injured.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, and particularly relates to an aging test device for low-voltage frequency converters. Background Art

[0002] A frequency converter is a power regulation device used to adjust the speed of an electric motor and control the load. By adjusting the frequency and voltage of the power supply, it can precisely control the speed and output power of the electric motor.

[0003] Most of the existing aging methods for low-voltage frequency converters are that the input end of the frequency converter is connected to the power grid, and the output end is connected to a reactor, a load resistor or a motor, and reactive aging is performed with a reactor. The aging method is not comprehensive, and in case of overload during the aging of the frequency converter, situations such as fire will occur, which will endanger the safety of experimental personnel. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an aging test device for low-voltage frequency converters, so as to solve the problems that most of the existing aging methods for low-voltage frequency converters are that the input end of the frequency converter is connected to the power grid, the output end is connected to a reactor, a load resistor or a motor, and reactive aging is performed with a reactor. The aging method is not comprehensive, and in case of overload during the aging of the frequency converter, situations such as fire will occur, which will endanger the safety of experimental personnel.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: An aging test device for low-voltage frequency converters, including a test cabinet, the front side of the test cabinet is rotatably connected with a sealing door through a rotating shaft, the top of the sealing door is fixedly connected with a spray disc, the side of the spray disc is communicated with a pipe body, the top of the test cabinet is movably connected with a test mechanism, the bottom of the test cabinet is provided with a bottom groove, and a driver is fixedly connected inside the bottom groove;

[0006] The test mechanism includes a test bench, a sliding plate, a rack and a positioning rod. The bottom of the test bench is fixedly connected with a sliding plate, the middle and rear sides of the bottom of the test bench are respectively fixedly connected with a rack and a positioning rod, and an alarm lamp is arranged on the top of the test bench.

[0007] As a preferred technical scheme of the utility model, a dry powder box is fixedly connected to the top of the test cabinet, a pressure pump is fixedly connected to the top front side of the dry powder box, the side of the pressure pump is communicated with the pipe body, the sealing door movably installed on the front of the test cabinet has a spray disc installed on the top, and the spray disc is communicated with the pressure pump on the front side of the dry powder box through the pipe body. Once the temperature sensor on the front of the test bench detects that the temperature inside the test cabinet exceeds the critical value, the pressure pump is started, and the spray disc can perform a cooling operation on the frequency conversion cabinet inside the test box.

[0008] As a preferred technical scheme of the utility model, a slide rail is provided at the bottom of the test cabinet, and the side of the slide plate at the bottom of the test bench is slidably connected to the inside of the slide rail.

[0009] As a preferred technical solution of the present utility model, a positioning groove is provided at the rear side of the test cabinet, and the inner side of the positioning groove is slidably connected to the positioning rod at the rear side of the test bench.

[0010] As a preferred technical solution of the present utility model, a gear is fixedly connected to the output shaft of the driver inside the bottom groove, and the gear is meshed with the side of the rack; a test mechanism is installed inside the slide rail provided at the bottom of the test cabinet, and the rack installed at the bottom of the test bench inside the test mechanism is meshed with the gear on the output shaft of the driver. The driver drives the gear to rotate, and the frequency conversion cabinet on the test bench can be moved out of the test cabinet, avoiding direct manual removal by the tester. Since there is residual high temperature on the frequency conversion cabinet during the test, it will harm the tester.

[0011] As a preferred technical solution of the present utility model, a temperature sensor is fixedly connected to the front of the test bench, and the temperature sensor is electrically connected to the alarm lamp inside the test cabinet.

[0012] As a preferred technical solution of the present utility model, a wiring groove is provided on the side of the test cabinet, and a nameplate is provided on the side of the wiring groove; a nameplate is provided at the top of the wiring groove provided on the side of the test cabinet. The tester can accurately judge which line is damaged according to the nameplate, improving work efficiency.

[0013] As a preferred technical solution of the present utility model, a display screen and test knobs are respectively provided at the front side of the top of the test cabinet. There are three groups of test knobs on the top of the test cabinet. The three groups of test knobs are connected to the frequency conversion cabinet through the wiring groove in sequence. The three test knobs are connected to different voltages, and the aging time difference of the frequency conversion cabinet under different voltages can be tested, and accurate values are displayed through the display screen.

[0014] As a preferred technical solution of the present utility model, a frequency conversion cabinet is clamped in the test slot at the top of the test bench.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] In the present utility model, a spray disc is installed at the top of the sealing door movably installed on the front of the test cabinet, and the spray disc is communicated with the pressure pump on the front side of the dry powder box through a pipe body. Once the temperature sensor on the front of the test bench detects that the temperature inside the test cabinet exceeds the critical value, the pressure pump is started, and the spray disc can cool the frequency conversion cabinet inside the test box.

[0017] The utility model is provided with three groups of test knobs at the top of the test cabinet. The three groups of test knobs are connected to the frequency conversion cabinet through the wiring groove in sequence. The three test knobs are connected to different voltages, which can be used to test the aging time difference of the frequency conversion cabinet under different voltages. The accurate values are displayed through the display screen. A test mechanism is installed inside the slide rail opened at the bottom of the test cabinet. The rack installed at the bottom of the test bench in the test mechanism is meshed with the gear on the output shaft of the driver. The driver drives the gear to rotate, and the frequency conversion cabinet on the test bench can be moved out of the inside of the test cabinet, avoiding direct manual removal by the tester. Since there is residual high temperature on the frequency conversion cabinet during the test, it will harm the tester. And there is a nameplate at the top of the wiring groove opened on the side of the test cabinet. The tester can accurately judge which line is damaged according to the nameplate, improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the main structural view of the utility model;

[0019] Figure 2 is the partial main structural view of the utility model;

[0020] Figure 3 is the structural view of the test cabinet of the utility model;

[0021] Figure 4 is the structural view of the test mechanism of the utility model;

[0022] Figure 5 is the combined view of the driver and the gear of the structure of the utility model.

[0023] In the figure: 1. Test cabinet; 2. Sealing door; 3. Spray disc; 4. Pipe body; 5. Dry powder box; 6. Pressurizing pump; 7. Display screen; 8. Test knob; 9. Alarm lamp; 10. Slide rail; 11. Test mechanism; 111. Test bench; 112. Slide plate; 113. Rack; 114. Positioning rod; 12. Temperature sensor; 13. Wiring groove; 14. Frequency conversion cabinet; 15. Bottom groove; 16. Gear; 17. Driver; 18. Positioning groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1-5, the utility model provides a low-voltage frequency converter aging test device, which includes a test cabinet 1. The front side of the test cabinet 1 is rotatably connected with a sealing door 2 through a rotating shaft. The top of the sealing door 2 is fixedly connected with a spray disc 3. The side of the spray disc 3 is communicated with a pipe body 4. The front side of the top of the test cabinet 1 is respectively provided with a display screen 7 and a test knob 8. The top of the test cabinet 1 is movably connected with a test mechanism 11. The bottom of the test cabinet 1 is provided with a bottom groove 15, and a driver 17 is fixedly connected to the inside of the bottom groove 15; There are three groups of test knobs 8 on the top of the test cabinet 1. The three groups of test knobs 8 are connected to the frequency conversion cabinet 14 through the wiring groove 13 in sequence. The three test knobs 8 are connected to different voltages, and can be used to test the aging time difference of the frequency conversion cabinet 14 under different voltages.

[0026] The test mechanism 11 includes a test bench 111, a slide plate 112, a rack 113 and a positioning rod 114. The bottom of the test bench 111 is fixedly connected with the slide plate 112, and the frequency conversion cabinet 14 is clamped in the test groove on the top of the test bench 111. The middle part and the rear side of the bottom of the test bench 111 are respectively fixedly connected with the rack 113 and the positioning rod 114.

[0027] A dry powder box 5 is fixedly connected to the top of the test cabinet 1. A pressure pump 6 is fixedly connected to the front top of the dry powder box 5. The side of the pressure pump 6 is communicated with the pipe body 4. The spray disc 3 is installed on the top of the sealing door 2 movably installed on the front of the test cabinet 1. The spray disc 3 is communicated with the pressure pump 6 on the front side of the dry powder box 5 through the pipe body 4. Once the temperature sensor 12 on the front of the test bench 111 detects that the temperature inside the test cabinet exceeds the critical value, the pressure pump 6 is started, and the spray disc 3 can cool the frequency conversion cabinet 14 inside the test box. A slide rail 10 is opened at the bottom of the test cabinet 1, and the side of the slide plate 112 at the bottom of the test bench 111 is slidably connected to the inside of the slide rail 10. A positioning groove 18 is opened at the rear side of the test cabinet 1, and the inside of the positioning groove 18 is slidably connected to the positioning rod 114 at the rear side of the test bench 111.

[0028] A gear 16 is fixedly connected to the output shaft of the driver 17 inside the bottom groove 15, and the gear 16 is meshed with the side of the rack 113; The test mechanism 11 is installed inside the slide rail 10 opened at the bottom of the test cabinet 1. The rack 113 installed at the bottom of the test bench 111 inside the test mechanism 11 is meshed with the gear 16 on the output shaft of the driver 17. The driver 17 drives the gear 16 to rotate, and the frequency conversion cabinet 14 on the test bench 111 can be moved out of the inside of the test cabinet 1, avoiding direct manual removal by the test personnel. Since there is residual high temperature on the frequency conversion cabinet 14 during the test process, it will harm the test personnel. A temperature sensor 12 is fixedly connected to the front of the test bench 111, and the temperature sensor 12 is electrically connected to the alarm lamp 9 inside the test cabinet 1. A wiring groove 13 is opened on the side of the test cabinet 1, and a nameplate is provided on the side of the wiring groove 13; A nameplate is provided on the top of the wiring groove 13 opened on the side of the test cabinet 1. The test personnel can accurately judge which line is damaged according to the nameplate, improving the work efficiency.

[0029] During specific use, first, place the frequency conversion cabinet 14 inside the test slot at the top of the test bench 11. There are three groups of test knobs 8 on the top of the test cabinet 1. Connect the three groups of test knobs 8 to the frequency conversion cabinet 14 through the wiring slot 13 in sequence. The three test knobs 8 are connected to different voltages, which can be used to test the aging time difference of the frequency conversion cabinet 14 under different voltages. A spray disc 3 is installed on the top of the sealing door 2 that is movably installed on the front of the test cabinet 1. The spray disc 3 is connected to the pressure pump 6 on the front side of the dry powder box 5 through a pipe body 4. Once the temperature sensor 12 on the front of the test bench 111 detects that the temperature inside the test cabinet exceeds the critical value, start the pressure pump 6, and the spray disc 3 can cool down the frequency conversion cabinet 14 inside the test box. A test mechanism 11 is installed inside the slide rail 10 opened at the bottom of the test cabinet 1. A rack 113 installed at the bottom of the test bench 111 inside the test mechanism 11 is meshed and connected with a gear 16 on the output shaft of the driver 17. The driver 17 drives the gear 16 to rotate, and the frequency conversion cabinet 14 on the test bench 111 can be moved out of the inside of the test cabinet 1, avoiding direct manual removal by the test personnel. Since there is residual high temperature on the frequency conversion cabinet 14 during the test, it will harm the test personnel. And there is a nameplate on the top of the wiring slot 13 opened on the side of the test cabinet 1. The test personnel can accurately judge which line is damaged according to the nameplate, improving the work efficiency.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low voltage inverter aging test device, comprising a test cabinet (1), characterized in that: The front side of the test cabinet (1) is rotatably connected to a sealing door (2) via a rotating shaft, the top of the sealing door (2) is fixedly connected to a spray disc (3), the side of the spray disc (3) is connected to a pipe body (4), the top of the test cabinet (1) is movably connected to a testing mechanism (11), the bottom of the test cabinet (1) is provided with a bottom groove (15), and the inner side of the bottom groove (15) is fixedly connected to a driver (17); The testing mechanism (11) comprises a testing platform (111), a slide plate (112), a rack (113) and a positioning rod (114); the bottom of the testing platform (111) is fixedly connected to the slide plate (112); the middle of the bottom and the rear side of the testing platform (111) are respectively fixedly connected to the rack (113) and the positioning rod (114); and an alarm light (9) is provided on the top of the testing platform (111).

2. A low voltage inverter aging test device according to claim 1, characterized in that: The top of the test cabinet (1) is fixedly connected to a dry powder box (5), the front top of the dry powder box (5) is fixedly connected to a pressure pump (6), and the side of the pressure pump (6) is connected to the pipe body (4).

3. The low voltage inverter aging test device according to claim 1, characterized in that: A slide rail (10) is provided at the bottom of the test cabinet (1), and the inner side of the slide rail (10) is slidably connected to the side of a slide plate (112) at the bottom of the test bench (111).

4. The low voltage inverter aging test device according to claim 1, characterized in that: A positioning groove (18) is provided on the rear side of the test cabinet (1), and the inner side of the positioning groove (18) is slidably connected to a positioning rod (114) on the rear side of the test bench (111).

5. The low voltage inverter aging test device according to claim 1, characterized in that: A gear (16) is fixedly connected to the output shaft of the driver (17) and is located inside the bottom groove (15). The gear (16) is meshedly connected to the side of the rack (113).

6. The low voltage inverter aging test device according to claim 1, characterized in that: A temperature sensor (12) is fixedly connected to the front of the test bench (111), and the temperature sensor (12) is electrically connected to an alarm light (9) inside the test cabinet (1).

7. The low voltage inverter aging test device according to claim 1, characterized in that: A wiring slot (13) is provided on the side of the test cabinet (1), and a nameplate is provided on the side of the wiring slot (13).

8. The low voltage inverter aging test device according to claim 1, characterized in that: A display screen (7) and a test knob (8) are respectively provided on the top front side of the test cabinet (1).

9. The low voltage inverter aging test device according to claim 1, characterized in that: A frequency conversion cabinet (14) is clamped in a test slot on the top of the test bench (111).

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