Transformer short circuit test equipment

Abstract

The utility model relates to the technical field of transformer test, in particular to transformer short circuit test equipment, which comprises a table body, a workbench is arranged at the top of the table body, two test tables are symmetrically arranged on the workbench in a left-right spaced manner, a test equipment box is arranged on one side of the workbench, wiring holes are formed in the test tables, and the wiring holes are electrically connected with the test equipment box through cables. A protective assembly is arranged on the workbench and comprises a support located in the center of the workbench, a protective cover capable of turning and swinging leftwards and rightwards is hinged to the support, the bottom of the protective cover is of an opening structure, and after the protective cover turns and swings leftwards and rightwards, the protective cover can cover the test beds on the left side and the right side respectively. The fire-fighting through holes penetrate through the table body and are connected with fire extinguishers through connecting pipes. According to the utility model, the problem that the efficiency of a test link in production is greatly influenced due to long feeding and discharging periods caused by the fact that a protection structure of some current experimental equipment only aims at a single station is solved.

Description

Technical Field

[0001] This utility model relates to the field of transformer testing technology, and in particular to a transformer short-circuit testing device. Background Technology

[0002] A power transformer is a soft magnetic electromagnetic component that functions as a power transmitter, voltage converter, and insulation. It is widely used in power supply technology and power electronics technology. Based on the power transmitted, power transformers can be divided into several categories: above 10kVA is high power, 10kVA to 0.5kVA is medium power, 0.5kVA to 25VA is low power, and below 25VA is micro power.

[0003] After searching, it was found that the application with publication number CN104502765B, entitled "A Power Transformer Secondary Short Circuit Test Device", proposes that in certain special working environments in actual work, the power transformer needs to operate under the condition of "primary (input) energized and secondary (output) short-circuited". This working environment causes significant damage to the internal protection system of the power transformer. In order to examine the life of each power transformer under this working environment and verify whether it meets the production and use requirements, the incoming inspection department needs to simulate this working environment and conduct random testing on the power transformers (randomly select power transformer samples for secondary short circuit test). When the secondary short circuit occurs, the power transformer overheats internally and is very likely to burn out and generate a fire. In response, patent CN220357228U discloses a short-circuit test device for power transformers. It uses a tempered glass cover that can be raised and lowered to protect the test station. However, this protective structure only covers a single station, which hinders the loading and unloading of transformers. The transformers to be tested can only be loaded after the tempered glass cover is raised and removed from the previous test and the transformer to be tested has been unloaded. This results in a long loading and unloading cycle, which greatly affects the efficiency of the testing process in production. Utility Model Content

[0004] This utility model provides a transformer short-circuit testing device, which helps to solve the problem that some current test equipment has a protection structure that is only for a single workstation, which hinders the loading and unloading of transformers. It requires waiting for the tempered glass cover to rise and move out of position, and the transformer to be tested can only be loaded after the previous transformer has been unloaded. In other words, the loading and unloading cycle is long, which greatly affects the efficiency of the testing process in production.

[0005] This utility model is implemented as follows:

[0006] A transformer short-circuit testing device includes a table body with a workbench on top. Two test benches are symmetrically arranged at left and right intervals on the workbench. A test equipment box is located on one side of the workbench. Wiring holes are provided on the test benches, and the wiring holes are electrically connected to the test equipment box via cables. A protective assembly is provided on the workbench, including a support frame located at the center of the workbench. A protective cover that can swing left and right is hinged to the support frame. The bottom of the protective cover is open, allowing it to cover the test benches on the left and right sides respectively after swinging left and right. A fire extinguishing hole is provided around the perimeter of the workbench, penetrating the table body and connected to a fire extinguisher via a connecting pipe.

[0007] Based on the above technical solution, the protective component includes two brackets spaced apart front and rear, a first crossbar is provided on the brackets, a swing arm is hinged to the first crossbar, a second crossbar is provided at the free end of the swing arm, and the top of the protective cover is hinged to the second crossbar.

[0008] Based on the above technical solution, the axes of the first and second crossbars are horizontal and oriented front to back.

[0009] Based on the above technical solution, the protective cover is a rectangular cover structure made of transparent fiberglass.

[0010] Based on the above technical solution, the bottom of the protective cover is provided with a sealing ring that can elastically abut against the workbench at the outer edge of the opening structure.

[0011] Based on the above technical solution, the bottom of the protective cover is provided with a sealing groove at the outer edge of the opening structure, the sealing ring is provided in the sealing groove, and the outer end of the sealing ring is provided with an elastic pleated structure extending to the outside of the sealing groove.

[0012] Based on the above technical solution, two protective covers are hinged to the second crossbar, and the opening ends of the two protective covers are located on the side away from the second crossbar.

[0013] Based on the above technical solution, the two protective covers are connected and fixed on adjacent sides by an associated block.

[0014] Based on the above technical solution, a handle is provided on the outer wall of the protective cover.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] This invention features two symmetrically spaced test benches on a workbench, each equipped with a protective component. The protective component includes a swivel shield that can tilt left and right, effectively covering both test benches. A fire extinguishing hole is located around the perimeter of the workbench, penetrating the table and connected to a fire extinguisher via a connecting pipe. Therefore, the two test benches can be used simultaneously, allowing the next transformer to be prepared for testing while the previous transformer is being tested. This ensures seamless testing, significantly shortening the material changeover cycle and improving the efficiency of the testing process within the same test equipment box and protective shield. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a transformer short-circuit test device in one embodiment;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the central protective component;

[0020] Figure 3 This is a schematic diagram of the installation structure of the sealing ring in one embodiment;

[0021] Figure 4 This is a cross-sectional view of the installation structure of the sealing ring in one embodiment;

[0022] Figure 5 for Figure 2 Top view;

[0023] Figure 6 This is a schematic diagram of the protective component in another embodiment.

[0024] The diagram is labeled as follows: 100, table body; 110, support leg; 120, workbench; 121, fire extinguishing hole; 200, test bench; 210, wiring hole; 300, test equipment box; 400, protective component; 410, bracket; 420, first crossbar; 430, swing arm; 440, second crossbar; 450, protective cover; 451, hinge; 452, sealing ring; 453, sealing groove; 460, connecting block; 470, handle; 500, fire extinguisher; 510, connecting pipe. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0026] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Example 1: Combination Figure 1-5 This embodiment discloses a transformer short-circuit test device, which aims to solve the problem that some current test devices have long loading and unloading cycles due to the protection structure only targeting a single workstation, which greatly affects the efficiency of the test process in production.

[0030] The transformer short-circuit testing equipment specifically includes a table 100, which is made of a horizontal plate and has legs 110 at the bottom for height enhancement. A horizontal workbench 120 is provided on the top of the table 100, and the workbench 120 is detachably connected to the table 100 by bolt assembly, which facilitates subsequent disassembly, maintenance and replacement of the workbench 120.

[0031] The workbench 120 has two symmetrically spaced test benches 200, which are used to mount transformers. A test equipment box 300 is located on one side of the workbench 120. The test benches 200 have wiring holes 210, which are electrically connected to the test equipment box 300 via cables. Providing wiring holes 210 directly on the test benches 200 facilitates quick wiring to the transformer terminals. Using the test benches 200 as a relay structure makes the cable connection between the transformer and the test equipment box 300 more stable and easier to connect. It should be noted that the test equipment box 300 is existing technology; its specific structure and working principle can be found in patent CN220357228U and other related content, and will not be elaborated further here. Those skilled in the art can select and implement the appropriate model from existing technology based on actual operating conditions.

[0032] The workbench 120 is equipped with a protective component 400, which is used to wrap the transformer during the test to prevent the power transformer from catching fire or exploding and flying debris from injuring people. It can also prevent the fire from spreading and improve the safety of the test.

[0033] Specifically, the protective assembly 400 includes a bracket 410 located at the center of the workbench 120, with a protective cover 450 hinged to the bracket 410 and capable of tilting left and right. Two brackets 410 are spaced apart, and each bracket 410 has a first crossbar 420. A swing arm 430 is hinged to the first crossbar 420, and a second crossbar 440 is attached to the free end of the swing arm 430. The top of the protective cover 450 is hinged to the second crossbar 440 via a hinge part 451. The first crossbar 420 and the second crossbar 440 are axially oriented horizontally front to back.

[0034] Furthermore, the protective cover 450 is a rectangular cover structure made of transparent fiberglass, which facilitates the observation of the internal situation. The bottom of the protective cover 450 has an open structure, and after the protective cover 450 is tilted left and right, it can cover the test benches 200 on the left and right sides respectively.

[0035] The workbench 120 is located around the test bench 200 and has a fire extinguishing hole 121. The fire extinguishing hole 121 passes through the table body 100 and is connected to the fire extinguisher 500 through the connecting pipe 510. In the event of a fire during the transformer test, the operator can turn on the fire extinguisher 500 switch. The extinguishing agent enters the protective cover 450 through the connecting pipe 511 and the fire extinguishing hole 121 to suppress the fire source.

[0036] To ensure optimal protection after the protective cover 450 is in place, a sealing ring 452 is provided at the bottom of the protective cover 450 along the outer edge of the opening structure, capable of elastically abutting against the workbench 120. Specifically, in conjunction with... Figure 3 and Figure 4The bottom of the protective cover 450 is provided with a rectangular recessed sealing groove 453 at the outer edge of the opening structure. The sealing ring 452 is disposed in the sealing groove 453. The outer end of the sealing ring 452 is provided with an elastic pleated structure extending to the outside of the sealing groove 453. After the protective cover 450 covers the transformer and the workbench, the bottom of the protective cover 450 abuts against the workbench 120. The elastic pleated structure at the bottom of the sealing ring 452 is pressed tightly against the workbench 120 and the protective cover 450, forming a stable and reliable sealing structure.

[0037] Example 2: Based on Example 1, combined with Figure 6 As shown, two protective covers 450 are hinged to the second crossbar 440, with the opening ends of both protective covers 450 located on the side away from the second crossbar 440. To make the structure more stable and reliable, the adjacent sides of the two protective covers 450 are connected and fixed by an interlocking block 460. The two protective covers 450 work together to form a combined cover with openings at the top and bottom. This helps to reduce the amount of rotational movement of the protective covers 450 relative to the second crossbar 440, thereby improving the efficiency of the flipping and covering operation.

[0038] Furthermore, to facilitate gripping during operation, a handle 470 is provided on the outer wall of the protective cover 450.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A transformer short-circuit testing device, characterized in that, The system includes a table body (100), a workbench (120) on top of the table body (100), two test benches (200) symmetrically spaced on the workbench (120), a test equipment box (300) on one side of the workbench (120), wiring holes (210) on the test benches (200) for electrical connection to the test equipment box (300) via cables, and a protective assembly (400) on the workbench (120). The protective assembly (400) includes components located on the workbench (100). 120) A support (410) is located at the center. A protective cover (450) that can be tilted left and right is hinged on the support (410). The bottom of the protective cover (450) is open. After the protective cover (450) tilts left and right, it can cover the test benches (200) on the left and right sides respectively. The workbench (120) is located on the periphery of the test bench (200) and has a fire hole (121). The fire hole (121) passes through the table body (100) and is connected to the fire extinguisher (500) through the connecting pipe (510).

2. The transformer short-circuit test equipment according to claim 1, characterized in that, The protective assembly (400) includes two brackets (410) spaced apart front to back. A first crossbar (420) is provided on the bracket (410). A swing arm (430) is hinged to the first crossbar (420). A second crossbar (440) is provided at the free end of the swing arm (430). The top of the protective cover (450) is hinged to the second crossbar (440).

3. The transformer short-circuit test equipment according to claim 2, characterized in that, The first crossbar (420) and the second crossbar (440) are oriented horizontally in a front-to-back direction.

4. The transformer short-circuit test equipment according to claim 1, characterized in that, The protective cover (450) is a rectangular cover structure made of transparent fiberglass.

5. The transformer short-circuit test equipment according to claim 1, characterized in that, The bottom of the protective cover (450) is provided with a sealing ring (452) that can elastically abut against the worktable (120) at the outer edge of the opening structure.

6. The transformer short-circuit test equipment according to claim 5, characterized in that, The bottom of the protective cover (450) is provided with a sealing groove (453) at the outer edge of the opening structure. The sealing ring (452) is provided in the sealing groove (453), and the outer end of the sealing ring (452) is provided with an elastic pleated structure extending to the outside of the sealing groove (453).

7. A transformer short-circuit test device according to claim 2, characterized in that, Two protective covers (450) are hinged to the second crossbar (440), and the opening ends of the two protective covers (450) are located on the side away from the second crossbar (440).

8. The transformer short-circuit test equipment according to claim 7, characterized in that, The two protective covers (450) are connected and fixed on adjacent sides by an associated block (460).

9. A transformer short-circuit test device according to claim 8, characterized in that, A handle (470) is provided on the outer wall of the protective cover (450).

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