Earth leakage protection test device

Abstract

The utility model relates to an earth leakage protection test device. The earth leakage protection test device comprises a high-voltage power supply, a high-temperature environment box and a low-temperature ice water tank arranged below the high-temperature environment box, one end of the high-voltage power supply is fixedly connected with a spiral high-voltage connecting line, an electric telescopic rod is installed at the top of the high-temperature environment box, and a clamping assembly is arranged at the telescopic end of the electric telescopic rod. The electric telescopic rod drives the clamping assembly to move up and down in the high-temperature environment box and the low-temperature ice water box, and a test sample is clamped on the clamping assembly. The earth leakage protection test device not only can carry out an ice water immersion test in the low-temperature ice water tank, but also can simulate the situation that ice water splashes onto a direct-current high-voltage electric appliance of a new energy automobile during driving on a pavement with water in winter by arranging a spray head in the low-temperature ice water tank, and carries out an ice water splashing test on a test sample.

Description

Technical Field

[0001] The utility model belongs to the technical field of testing devices, and in particular relates to a leakage protection testing device. Background Art

[0002] Leakage protection test is an important safety inspection task. This test is designed to verify whether the equipment or system can detect leakage in time and take corresponding measures to ensure the normal operation of electrical equipment and systems and prevent personal injury and property loss caused by leakage.

[0003] After searching, it was found that a new energy high-voltage electrical ice water impact test device was disclosed in a Chinese patent document (application number: CN2202221778955.6), including a high-voltage power supply, a high-temperature environmental box and a low-temperature ice water tank, one end of the high-voltage power supply is fixedly connected to a spiral high-voltage connecting wire, and the end of the spiral high-voltage connecting wire away from the high-voltage power supply passes through a through hole and extends into the high-temperature environmental box; a sample basket lifting mechanism is installed on the top of the high-temperature environmental box, and a hollow sample basket is fixedly connected to the bottom of the sample basket lifting mechanism, and a test sample is placed in the center of the hollow sample basket; a grounding device is connected to the bottom of one side of the outer wall of the low-temperature ice water tank, and a leakage current controller is installed on the grounding device. The operation process of the device is relatively simple. Although it can better test the leakage protection ability of the DC high-voltage electrical appliances of new energy vehicles when they are subjected to ice and snow, the device cannot perform ice water splashing tests, and cannot simulate the thermal shock caused by ice water when ice water splashes onto the DC high-voltage electrical appliances of new energy vehicles when driving on a wet road in winter, so that the test value of the leakage protection ability of the DC high-voltage electrical appliances in this actual situation cannot be obtained. Utility Model Content

[0004] The purpose of the utility model is to provide a leakage protection test device with simple structure and reasonable design in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A leakage protection test device comprises a high-voltage power supply, a high-temperature environment box and a low-temperature ice water tank arranged below the high-temperature environment box, one end of the high-voltage power supply is fixedly connected with a spiral high-voltage connecting wire, an electric telescopic rod is installed on the top of the high-temperature environment box, and a clamping assembly is arranged at the telescopic end of the electric telescopic rod, the electric telescopic rod drives the clamping assembly to move up and down inside the high-temperature environment box and the low-temperature ice water tank, a test sample is clamped on the clamping assembly, one end of the spiral high-voltage connecting wire is connected to the test sample, a nozzle is connected to the inner wall of the low-temperature ice water tank, one end of the nozzle is connected to a water pipe, the other end of the water pipe extends to the inner bottom of the low-temperature ice water tank and is connected to a water pump, sufficient space is reserved between the highest liquid level of water in the low-temperature ice water tank and the inner top of the low-temperature ice water tank to place the test sample, the nozzle is located above the highest liquid level of water in the low-temperature ice water tank, a grounding device is connected to the outer wall surface of the low-temperature ice water tank, and a leakage current controller is connected to the grounding device.

[0007] As a further optimization scheme of the utility model, a slide rail is provided on the inner top of the high temperature environment box, and a slider movable along the slide rail is connected to the surface of the slide rail. The slide rail includes a fixed part and a movable part. The fixed part is fixedly connected to the inner top of the high temperature environment box, and one end of the fixed part away from the movable part extends to the outside of the high temperature environment box, and the movable part is fixedly connected to the movable end of the electric telescopic rod.

[0008] As a further optimization solution of the utility model, a magnet is installed on a side of the movable part away from the fixed part, and an iron sheet used in conjunction with the magnet is installed on a side of the slider close to the magnet.

[0009] As a further optimization solution of the utility model, a notch is provided on the upper surface of the low-temperature ice water tank, and the notch allows the clamping assembly to pass through.

[0010] As a further optimization scheme of the utility model, the clamping assembly includes a slideway and a telescopic member fixedly connected to the lower surface of the slider, the lower surface of the slideway is fixedly connected to a base plate, the surface of the slideway is slidably connected to a pressure plate, the upper surface of the pressure plate is fixedly connected to the movable end of the telescopic member, and the test sample is placed between the pressure plate and the base plate.

[0011] As a further optimization solution of the utility model, a wire clamping groove 1 is opened on the side surface of the pressure plate, and the wire clamping groove 1 runs through from top to bottom, and the spiral high-voltage connecting wire is located inside the wire clamping groove 1.

[0012] As a further optimization solution of the present invention, the side wall surface of the high temperature environment box is connected with an openable and closable box door.

[0013] As a further optimization solution of the utility model, a mounting groove is provided on the side wall of the high temperature environment box, a connecting column is slidably connected to the inner side of the mounting groove, and the other end of the connecting column is fixedly connected to the surface of the box door.

[0014] As a further optimization solution of the utility model, a second wire clamping groove is provided on the upper surface of the box door.

[0015] As a further optimization scheme of the utility model, the inner surface of the box door is connected to a connecting hook, the side wall surface of the bottom plate is connected to a slot part used in conjunction with the connecting hook, and the lower end of the inner wall of the high-temperature environment box is connected to a support plate near the box door, and one end of the support plate extends to the outside of the box door.

[0016] As a further optimization solution of the utility model, a handle is connected to the outer surface of the box door.

[0017] The beneficial effects of the utility model are:

[0018] The utility model can not only perform ice water immersion test in a low-temperature ice water tank, but also, by arranging a nozzle in the low-temperature ice water tank, the device can simulate the scene when ice water splashes onto the DC high-voltage electrical appliances of the new energy vehicle when driving on a wet road in winter, and perform ice water splash test on the test sample;

[0019] The utility model can take out the test sample placed on the clamping device from the high temperature environment box by arranging the matching arrangement of the slide rail and the slide block, so that different test samples can be replaced conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the position relationship between the high temperature environment box and the box door of the utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the slide rail movable part and the clamping assembly of the utility model;

[0024] Figure 5 This is a schematic diagram of the overall structure of the clamping assembly of the utility model;

[0025] Figure 6 This utility model Figure 4 Enlarged view of point A in the middle.

[0026] In the figure: 1. high voltage power supply; 2. connecting wire; 3. electric telescopic rod; 4. high temperature environment box; 5. clamping assembly; 51. slideway; 52. pressure plate; 53. telescopic part; 54. bottom plate; 55. wire trough one; 6. test sample; 7. low temperature ice water tank; 8. leakage current controller; 9. grounding device; 10. movable part; 11. slider; 12. fixed part; 13. slot part; 14. connecting hook; 15. box door; 16. handle; 17. support plate; 18. magnet; 19. iron sheet; 20. nozzle; 21. water pump; 22. water pipe; 23. wire trough two; 24. connecting column; 25. slide rail; 26. notch. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0028] like Figure 1 and Figure 2 The structure shown in the figure is a leakage protection test device, comprising a high-voltage power supply 1, a high-temperature environment box 4 and a low-temperature ice water tank 7 arranged below the high-temperature environment box 4, one end of the high-voltage power supply 1 is fixedly connected with a spiral high-voltage connecting wire 2, an electric telescopic rod 3 is installed on the top of the high-temperature environment box 4, and a clamping assembly 5 is arranged at the telescopic end of the electric telescopic rod 3. The electric telescopic rod 3 drives the clamping assembly 5 to move up and down inside the high-temperature environment box 4 and the low-temperature ice water tank 7. A test sample 6 is clamped on the clamping assembly 5, and one end of the spiral high-voltage connecting wire 2 is connected to the test sample 6. The test sample 6 is connected, the inner wall of the low-temperature ice water tank 7 is connected with a nozzle 20, one end of the nozzle 20 is connected with a water pipe 22, the other end of the water pipe 22 extends to the inner bottom of the low-temperature ice water tank 7 and is connected with a water pump 21, and sufficient space is reserved between the highest liquid level of water in the low-temperature ice water tank 7 and the inner top of the low-temperature ice water tank 7 to place the test sample 6, the position of the nozzle 20 is above the highest liquid level of water in the low-temperature ice water tank 7, the outer wall surface of the low-temperature ice water tank 7 is connected with a grounding device 9, and the grounding device 9 is connected with a leakage current controller 8.

[0029] It should be noted that the electric telescopic rod 3 can be replaced by any mechanical structure that can perform linear motion; when performing the ice water immersion test, after the test sample 6 is immersed in water through the electric telescopic rod 3, the highest liquid level of the water in the low-temperature ice water tank 7 can cover the upper surface of the test sample 6.

[0030] It should be further explained that one side surface of the low-temperature ice water tank 7 is set to be made of glass material, so that the test situation can be observed during the test.

[0031] In actual use, the test sample 6 is heated by the high-temperature environmental box 4. When the test sample 6 reaches the required test temperature, the electric telescopic rod 3 is used to drive the test sample 6 to move down into the low-temperature ice water tank 7, so that the test sample 6 is completely entered into the low-temperature ice water tank 7 but not immersed in the water. When the water temperature drops to the required test temperature, the nozzle 20 can be turned on to perform an ice water splash resistance test on the test sample 6. After the test is completed, if the test structure is unqualified, the test is completed. If the test result is qualified, the ice water immersion resistance test can be continued. At this time, the test sample 6 is driven by the electric telescopic rod 3 to move up into the high-temperature environmental box 4, and the test sample 6 is heated to the required test temperature. Then the electric telescopic rod 3 can be operated to drive the test sample 6 to move down into the low-temperature ice water tank 7, so that the test sample 6 is completely immersed in water reaching the test temperature before the ice water immersion resistance test can be performed.

[0032] Furthermore, a slide rail 25 is provided on the inner top of the high temperature environment box 4, and a slider 11 that can move along the slide rail 25 is connected to the surface of the slide rail 25. The slide rail 25 includes a fixed part 12 and a movable part 10. The fixed part 12 is fixedly connected to the inner top of the high temperature environment box 4, and one end of the fixed part 12 away from the movable part 10 extends to the outside of the high temperature environment box 4, and the movable part 10 is fixedly connected to the movable end of the electric telescopic rod 3.

[0033] It should be noted that when the upper surface of the movable part 10 contacts the inner top of the high temperature environment box 4 , the fixed part 12 and the movable part 10 are located on the same horizontal line. At this time, it is a complete slide rail 25 , and the slider 11 can slide on the slide rail 25 .

[0034] like Figure 2 , Figure 4 and Figure 6 In the partial structure shown, a magnet 18 is installed on the side of the movable part 10 away from the fixed part 12 , and an iron sheet 19 used in conjunction with the magnet 18 is installed on the side of the slider 11 close to the magnet 18 .

[0035] It should be noted that, through the cooperation between the magnet 18 and the iron sheet 19, the surface of the slider 11 can fit the surface of the inner wall of the fixed portion 12 of the slide rail 25, preventing the slider 11 from sliding off the movable portion 10 when the electric telescopic rod 3 drives the movable portion 10 to move up and down.

[0036] Furthermore, a notch 26 is provided on the upper surface of the low-temperature ice water tank 7 , and the notch 26 allows the clamping assembly 5 to pass through.

[0037] like Figure 5As shown in the partial structure, the clamping assembly 5 includes a slide 51 and a telescopic member 53 fixedly connected to the lower surface of the slider 11, the lower surface of the slide 51 is fixedly connected to a bottom plate 54, the surface of the slide 51 is slidably connected to a pressure plate 52, the upper surface of the pressure plate 52 is fixedly connected to the movable end of the telescopic member 53, and the test sample 6 is placed between the pressure plate 52 and the bottom plate 54.

[0038] It should be noted that the cross-sectional size of the fixing portion 12 of the slide rail 25 and the bottom plate 54 is smaller than or equal to the cross-sectional size of the pressure plate 52, and the size of the slot 26 is consistent with the size of the pressure plate 52. When the electric telescopic rod 3 is used to drive the clamping assembly 5 to move downward during the ice water splash test, the pressure plate 52 can be moved down to the position of the slot 26. In this way, during the test, the water sprayed from the nozzle 20 can be prevented from splashing out of the low-temperature ice water tank 7.

[0039] It should be further explained that when the pressing plate 52 just moves down to the position of the notch 26 , the lower surface of the test sample 6 is higher than the highest liquid level of the water.

[0040] Furthermore, a wire clamping groove 55 is formed on the side surface of the pressing plate 52 , and the wire clamping groove 55 is connected vertically, and the spiral high-voltage connecting wire 2 is located inside the wire clamping groove 55 .

[0041] It should be noted that the wire slot 55 is in an "L" shape.

[0042] In actual use, after the pressing plate 52 is moved up, the test sample 6 can be placed on the upper surface of the bottom plate 54. After adjusting the position of the test sample 6, the spiral high-voltage connecting wire 2 connected to the test sample 6 is placed from the opening of the wire clamping groove 55 on the side surface of the pressing plate 52 to the other end of the wire clamping groove 55. At this time, the pressing plate 52 is released, and the force of the telescopic member 53 drives the pressing plate 52 to cooperate with the bottom plate 54 to clamp the test sample 6.

[0043] like Figure 3 In the partial structure shown, the side wall surface of the high temperature environment box 4 is connected with an openable and closable box door 15.

[0044] It should be noted that the high temperature environment box 4 can be opened by providing the box door 15 , so as to facilitate placing the test sample 6 into the high temperature environment box 4 .

[0045] Furthermore, a mounting groove is formed on the side wall of the high temperature environment box 4 , and a connecting column 24 is slidably connected to the inner side of the mounting groove, and the other end of the connecting column 24 is fixedly connected to the surface of the box door 15 .

[0046] Furthermore, a second wire clamping groove 23 is provided on the upper surface of the box door 15 .

[0047] It should be noted that the setting of the wire clamping groove 23 is to facilitate the placement of the spiral high-voltage connecting wire 2. Through the coordinated setting of the wire clamping groove 1 55 and the wire clamping groove 23, when the test sample 6 is placed on the clamping assembly 5 and the box door 15 is closed, the spiral high-voltage connecting wire 2 will not be clamped, causing damage to the spiral high-voltage connecting wire 2.

[0048] like Figure 1 and Figure 2 In the partial structure shown, the inner surface of the box door 15 is connected to a connecting hook 14, the side wall surface of the bottom plate 54 is connected to a slot 13 used in conjunction with the connecting hook 14, and the lower end of the inner wall of the high-temperature environment box 4 is connected to a support plate 17 near the box door 15, and one end of the support plate 17 extends to the outside of the box door 15.

[0049] It should be noted that the end of the connecting hook 14 away from the box door 15 is in a hook shape, and the matching slot part 13 is in a "U" shape. When the fixed part 12 and the movable part 10 of the slide rail 25 are located on the same horizontal line, the hook-shaped end of the connecting hook 14 is engaged with the inside of the "U"-shaped slot part 13. At this time, the slot part 13 can be moved by moving the connecting hook 14.

[0050] Furthermore, a handle 16 is connected to the outer surface of the door 15 .

[0051] In actual use, the operator can hold the handle 16 and pull the box door 15 to make the connecting hook 14 drive the matching slot 13 to move the clamping assembly 5 outside the high temperature environment box 4. At this time, the clamping assembly 5 is located above the support plate 17, which is convenient for placing the test sample 6 on the clamping assembly 5.

[0052] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A leakage protection test device, comprising a high voltage power supply (1), a high temperature environment box (4) and a low temperature ice water box (7) arranged below the high temperature environment box (4), characterized in that: One end of the high-voltage power supply (1) is fixedly connected to a spiral high-voltage connecting wire (2); an electric telescopic rod (3) is installed on the top of the high-temperature environment box (4); a clamping assembly (5) is provided at the telescopic end of the electric telescopic rod (3); the electric telescopic rod (3) drives the clamping assembly (5) to move up and down inside the high-temperature environment box (4) and the low-temperature ice water box (7); a test sample (6) is clamped on the clamping assembly (5); one end of the spiral high-voltage connecting wire (2) is connected to the test sample (6); and a nozzle (20) is connected to the inner wall of the low-temperature ice water box (7). ), one end of the nozzle (20) is connected to a water pipe (22), the other end of the water pipe (22) extends to the inner bottom of the low-temperature ice water tank (7) and is connected to a water pump (21), sufficient space is reserved between the highest liquid level of water in the low-temperature ice water tank (7) and the inner top of the low-temperature ice water tank (7) to place the test sample (6), the nozzle (20) is located above the highest liquid level of water in the low-temperature ice water tank (7), the outer wall surface of the low-temperature ice water tank (7) is connected to a grounding device (9), and the grounding device (9) is connected to a leakage current controller (8).

2. A leakage protection test device according to claim 1, characterized in that: The inner top of the high temperature environment box (4) is provided with a slide rail (25), the surface of the slide rail (25) is connected with a slider (11) movable along the slide rail (25), the slide rail (25) comprises a fixed portion (12) and a movable portion (10), the fixed portion (12) is fixedly connected to the inner top of the high temperature environment box (4), one end of the fixed portion (12) away from the movable portion (10) extends to the outside of the high temperature environment box (4), and the movable portion (10) is fixedly connected to the movable end of the electric telescopic rod (3).

3. A leakage protection test device according to claim 2, characterized in that: A magnet (18) is installed on a side of the movable part (10) away from the fixed part (12), and an iron sheet (19) used in conjunction with the magnet (18) is installed on a side of the slider (11) close to the magnet (18).

4. A leakage protection test device according to claim 1, characterized in that: The upper surface of the low-temperature ice water tank (7) is provided with a notch (26), and the notch (26) allows the clamping assembly (5) to pass through.

5. The leakage protection test device according to claim 1, characterized in that: The clamping assembly (5) comprises a slideway (51) and a telescopic member (53) fixedly connected to the lower surface of the slider (11); the lower surface of the slideway (51) is fixedly connected to a bottom plate (54); the surface of the slideway (51) is slidably connected to a pressure plate (52); the upper surface of the pressure plate (52) is fixedly connected to the movable end of the telescopic member (53); and the test sample (6) is placed between the pressure plate (52) and the bottom plate (54).

6. A leakage protection test device according to claim 5, characterized in that: A wire clamping groove (55) is provided on the side surface of the pressing plate (52), and the wire clamping groove (55) is connected vertically, and the spiral high-voltage connecting wire (2) is located inside the wire clamping groove (55).

7. The leakage protection test device according to claim 1, characterized in that: The side wall surface of the high temperature environment box (4) is connected to a box door (15) that can be opened and closed.

8. A leakage protection test device according to claim 7, characterized in that: The side wall of the high temperature environment box (4) is provided with a mounting groove, the inner side of which is slidably connected with a connecting column (24), and the other end of the connecting column (24) is fixedly connected to the surface of the box door (15).

9. The leakage protection test device according to claim 7, characterized in that: The upper surface of the box door (15) is provided with a second wire clamping groove (23).

10. The leakage protection test device according to claim 7, characterized in that: The inner surface of the box door (15) is connected to a connecting hook (14), the side wall surface of the bottom plate (54) is connected to a slot member (13) used in conjunction with the connecting hook (14), and the lower end of the inner wall of the high temperature environment box (4) near the box door (15) is connected to a support plate (17), and one end of the support plate (17) extends to the outside of the box door (15).

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