Electrical equipment insulation resistance test device

Abstract

The utility model belongs to the technical field of research and development tests of electrical equipment, and discloses an insulation resistance test device for electrical equipment, which comprises a box body, a box cover, an iron core, a clamping piece and a leading-out sleeve. An iron core is arranged at the bottom of an inner cavity of the box body, and clamping pieces are arranged on the two sides of the iron core and fixedly connected with the bottom of the box body. The iron core and the clamping piece are respectively connected with the leading-out sleeve, and the leading-out sleeve is installed on the surface of the box cover. And the box cover is connected with the box body through a fastener. By testing the ground insulation resistance of the iron core and the clamp of the electrical equipment, the product performance and data test is carried out in advance, and test data support is provided for the design of the electrical product, so that the product structure is optimized, the situation that the product cannot be normally used due to too low insulation resistance after production is avoided, and the product quality is improved. The problems that the product structure adjustment cost is too high and the period is too long are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of research and development testing of electrical equipment, in particular to an insulation resistance test device for electrical equipment. Background Art

[0002] Mineral insulating oil has been used in electrical equipment such as power transformers and reactors for over a hundred years. Its application technology is very mature and relevant technical standards have been systematized. However, mineral insulating oil is toxic and harmful.

[0003] With the advancement of global energy environmental protection and low-carbon development, environmentally friendly insulating oil is being used more and more widely in electrical equipment such as transformers. Its good insulation performance and environmentally friendly characteristics are gaining more and more acceptance, and it will be the first choice for the new generation of environmentally friendly insulating oil.

[0004] However, since environmentally friendly insulating oil and mineral insulating oil are different oil products, there are large differences in their various index parameters during application, especially the insulation resistance of the equipment is quite different from that of mineral insulating oil.

[0005] At present, most electrical equipment undergoes quality sampling inspection after the design is finalized and mass production begins. When it is found that the insulation resistance characteristics of the electrical products do not meet the requirements, the overall product structure is adjusted, resulting in problems such as excessive costs and long cycles. Utility Model Content

[0006] The purpose of the utility model is to provide an insulation resistance test device for electrical equipment to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] An insulation resistance test device for electrical equipment, comprising a box body, a box cover, an iron core, a clamp and a lead-out bushing;

[0009] An iron core is provided at the bottom of the inner cavity of the box body, and clamps are provided on both sides of the iron core, and the clamps are fixedly connected to the bottom of the box body;

[0010] The iron core and the clamp are respectively connected to the lead-out bushing;

[0011] The free end of the lead-out sleeve penetrates and is connected to the surface of the box cover;

[0012] The box cover is closed on the top of the box body.

[0013] Further preferably, insulating members are provided between the iron core and the clamp and between the iron core and the bottom of the inner cavity of the box.

[0014] Further preferably, the insulating member includes a facade insulating board, an insulating spacer and a plane insulating board;

[0015] A vertical insulating plate is provided between the iron core and the clamp, a plane insulating plate is provided between the iron core and the bottom of the inner cavity of the box body, and an insulating spacer is provided between the clamp and the plane insulating plate.

[0016] Further preferably, the iron core is provided with an iron core lead wire, and the clamp is provided with a clamp lead wire.

[0017] Further preferably, the lead-out sleeve includes an iron core lead-out sleeve and a clamp lead-out sleeve;

[0018] The iron core lead-out sleeve is electrically connected to the iron core lead-out wire;

[0019] The clamp lead-out sleeve is electrically connected to the clamp lead-out wire.

[0020] Further preferably, an oil inlet valve is provided on the top of the box cover, and the oil inlet valve is connected to the interior of the box body.

[0021] Further preferably, the inner wall of the box body is provided with insulating cardboard;

[0022] An oil drain plug for draining oil is provided at the bottom of the inner cavity side wall of the box body;

[0023] An oil sample valve for taking oil samples is provided in the middle of the inner cavity side wall of the box body.

[0024] Further preferably, the box body is connected to the box cover at the same potential via a copper strap fastener.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] The utility model provides an insulation resistance test device for electrical equipment. When the design of an electrical equipment product is completed, the insulation resistance data of the iron core and clamps of the electrical equipment product to the ground are tested by the insulation resistance test device, and the insulation resistance and related performance test data of the electrical equipment product are obtained, so as to optimize the product structure and guide production.

[0027] The present insulation resistance test device avoids the situation where the product cannot be used normally due to the insulation resistance being too low after mass production, solves the problem of excessive cost and long cycle for overall adjustment of product structure, improves the design and production efficiency of electrical equipment products, saves production costs, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the main view of the overall structure of the utility model;

[0029] Figure 2 This is a left view of the overall structure of the utility model;

[0030] Figure 3 This is a top view of the internal structure of the box of the present utility model;

[0031] In the figure: 1. Box body; 2. Box cover; 3. Iron core; 4. Clamp; 5. Iron core lead-out sleeve; 6. Clamp lead-out sleeve; 7. Insulator; 701. Vertical insulating board; 702. Insulating spacer; 703. Flat insulating board; 8. Oil drain plug; 9. Oil inlet valve; 10. Oil sample valve. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example 1: As shown in the attached Figure 1 As shown, this embodiment provides an insulation resistance test device for electrical equipment, including a box body 1, a box cover 2, an iron core 3, a clamp 4 and a lead-out bushing; the iron core 3 is provided at the bottom of the inner cavity of the box body 1, and clamps 4 are provided on both sides of the iron core 3, and the clamps 4 are fixedly connected to the bottom of the box body 1; the iron core 3 and the clamps 4 are respectively connected to the lead-out bushing; the free end of the lead-out bushing is connected to the surface of the box cover 2 through the box cover 2; the box cover 2 is covered on the top of the box body 1, and the box cover 2 and the box body 1 are connected by fasteners.

[0034] The iron core 3 is arranged at the center of the bottom of the inner cavity of the box body 1 and does not contact the other inner walls of the box body 1. The iron core 3 is made of stacked silicon steel sheets. Each silicon steel sheet is punched for easy stacking. According to product design requirements, the iron core 3 can be single-phase, three-phase, three-dimensional, flat and other specifications.

[0035] The clamps 4 are provided on both sides of the core 3 for clamping and securing the core 3. Depending on the shape of the core 3, the clamps 4 can be symmetrically arranged longitudinally or transversely and are secured by removable fasteners, such as bolts. A removable fastener is provided at the bottom of the inner cavity of the housing 1 and is secured to the clamps 4 by, for example, bolts.

[0036] The iron core 3 and the clamp 4 are electrically connected to the lead-out bushing, which is installed through the center of the surface of the box cover 2. The box cover 2 is connected to the box body 1 through fasteners and is sealed on the top of the box body 1.

[0037] When in use, the insulation resistance data of the iron core 3 and the clamp 4 are tested respectively by connecting one end of the resistance tester to the lead-out bushing and the other end to the ground.

[0038] Example 2: As shown in the attached Figure 1 , Attachment Figure 2 As shown, based on Example 1, this embodiment provides an insulation resistance test device for electrical equipment, and insulating parts 7 are provided between the iron core 3 and the clamp 4 and between the iron core 3 and the bottom of the inner cavity of the box 1.

[0039] Specifically, the insulating member 7 includes a vertical insulating plate 701, an insulating spacer 702, and a planar insulating plate 703. The vertical insulating plate 701 is positioned between the core 3 and the clamp 4, the planar insulating plate 703 is positioned between the core 3 and the bottom of the inner cavity of the housing 1, and the insulating spacer 702 is positioned between the clamp 4 and the planar insulating plate 703. The vertical insulating plate 701, the planar insulating plate 703, and the insulating spacer 702 are configured to suit the sizes and shapes of the core 3 and the clamp 4.

[0040] The iron core 3 is provided with an iron core lead wire, and the clamp 4 is provided with a clamp lead wire. The non-connected ends of the iron core lead wire and the clamp lead wire are limited and fixed by copper wire limiters provided on the inner wall of the box 1 to prevent the non-connected ends of the iron core lead wire and the clamp lead wire from swinging in the box 1.

[0041] The lead-out bushings, including the core lead-out bushing 5 and the clamp lead-out bushing 6, are fixed to the center of the cover 2 via fasteners. Lugs are welded to the terminals of both the core lead-out bushing 5 and the clamp lead-out bushing 6. The core lead-out bushing 5 is electrically connected to the core lead wire, and the clamp lead-out bushing 6 is electrically connected to the clamp lead wire. The insulation resistance to ground of the core 3 and clamp 4 is tested separately.

[0042] Example 3: As shown in the attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 As shown, based on Example 2, this embodiment provides a gas equipment insulation resistance test device, which further explains the environmentally friendly insulating oil and related components contained in the box 1.

[0043] The inner cavity of the box body 1 contains environmentally friendly insulating oil. The oil level is controlled according to the transformer capacity corresponding to the designed specifications of the core 3. Too high or too low an oil level may cause device failure.

[0044] An oil inlet valve 9 is provided on the top of the box cover 2 , and the oil inlet valve 9 is connected to the interior of the box body 1 . The oil inlet valve 9 is used to put environmentally friendly insulating oil into the box body 1 .

[0045] An oil drain plug 8 for draining oil is provided at the bottom of the inner cavity side wall of the box body 1. One end of the oil drain plug 8 is connected to the interior of the box body 1, and the other end is set as a free end to facilitate the discharge of the environmentally friendly insulating oil in the box body 1.

[0046] An oil sample valve 10 for taking oil samples is provided in the middle of the inner cavity side wall of the box body 1. One end of the oil sample valve 10 is connected to the interior of the box body 1, and the other end is set as a free end, which is convenient for taking oil samples to detect oil quality.

[0047] The inner wall of the box body 1 is provided with insulating cardboard, which has uniform thickness and tightness, does not contain conductive ions, has low moisture content, has a high dielectric constant, and is not prone to shrinkage and flexural deformation.

[0048] The box body 1 is connected to the box cover 2 at the same potential through copper belt fasteners to prevent electrical accidents caused by excessive potential difference, which is very necessary for power safety, lightning protection, and safe use of electrical equipment.

[0049] The outer bottom surface of the box body 1 is symmetrically provided with channel steels that match the track, so that the device can be moved along the track in the workshop and is easy to operate and use.

[0050] During use, insulating cardboard is installed on the inner wall of the box body 1, and the designed iron core 3, clamp 4 and insulating part 7 are installed to the bottom of the inner cavity of the box body 1 through fasteners. The iron core lead-out bushing 5 is electrically connected to the iron core lead-out wire, and the clamp lead-out bushing 6 is electrically connected to the clamp lead-out wire. According to the transformer capacity data corresponding to the specifications of the iron core 3, environmentally friendly insulating oil is put into the box body 1 to the specified oil level through the oil inlet valve 9. Using a resistance tester, one end is connected to the iron core lead-out bushing 5 and the clamp lead-out bushing 6 respectively, and the other end is grounded. The insulation resistance data of the iron core 3 and the clamp 4 are tested respectively, providing test data support for the design of electrical products.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention, and any reference numerals in the claims should not be construed as limiting the claims to which they relate.

[0052] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electrical equipment insulation resistance test device, characterized in that: It comprises a box body (1), a box cover (2), an iron core (3), a clamp (4) and a lead-out bushing; An iron core (3) is provided at the bottom of the inner cavity of the box (1), and clamps (4) are provided on both sides of the iron core (3), and the clamps (4) are fixedly connected to the bottom of the box (1); The iron core (3) and the clamp (4) are respectively connected to the lead-out bushing; The free end of the lead-out sleeve penetrates and is connected to the surface of the box cover (2); The box cover (2) covers the top of the box body (1).

2. An electrical equipment insulation resistance test device according to claim 1, characterized in that: Insulating members (7) are provided between the iron core (3) and the clamp (4) and between the iron core (3) and the bottom of the inner cavity of the box (1).

3. An electrical equipment insulation resistance test device according to claim 2, characterized in that: The insulating member (7) comprises a vertical insulating plate (701), an insulating spacer (702) and a plane insulating plate (703); A vertical insulating plate (701) is provided between the iron core (3) and the clamp (4), a plane insulating plate (703) is provided between the iron core (3) and the bottom of the inner cavity of the box (1), and an insulating spacer (702) is provided between the clamp (4) and the plane insulating plate (703).

4. The electrical equipment insulation resistance test device according to claim 1, characterized in that: The iron core (3) is provided with an iron core lead wire, and the clamp (4) is provided with a clamp lead wire.

5. The electrical equipment insulation resistance test device according to claim 4, characterized in that: The lead-out sleeve comprises an iron core lead-out sleeve (5) and a clamp lead-out sleeve (6); The iron core lead-out sleeve (5) is electrically connected to the iron core lead-out wire; The clamp lead-out sleeve (6) is electrically connected to the clamp lead-out wire.

6. The electrical equipment insulation resistance test device according to claim 1, characterized in that: An oil inlet valve (9) is provided on the top of the box cover (2), and the oil inlet valve (9) is connected to the interior of the box body (1).

7. The electrical equipment insulation resistance test device according to claim 1, characterized in that: The inner cavity wall of the box body (1) is provided with insulating cardboard; An oil drain plug (8) for draining oil is provided at the bottom of the inner cavity side wall of the box body (1); An oil sample valve (10) for taking oil samples is provided in the middle of the inner cavity side wall of the box body (1).

8. The electrical equipment insulation resistance test device according to claim 1, characterized in that: The box body (1) is connected to the box cover (2) at the same potential via a copper belt fastener.

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