A power electronic transformer breakdown tester

Abstract

The present invention relates to the technical field of transformer testers, and specifically to a breakdown tester for a power electronic transformer, comprising a tester body, a processing chamber at the lower end of the tester body, and a cooling mechanism inside the processing chamber. The present invention transports the liquid in the water storage chamber to the cooling coil by a water pump, and the liquid in the cooling coil is subjected to air cooling by a cooling fan. The cooled liquid flows out of the cooling coil, enters the cooling pipe through a liquid outlet pipe, and absorbs the heat generated during the test in the test chamber. The liquid after absorbing the heat then flows back to the water storage chamber of the cooling box through a reflux pipe, and the cycle repeats, thereby forming a complete cooling circulation system, continuously cooling the test process, preventing the tester from affecting the test results or damaging the internal components due to excessive temperature, and ensuring that the breakdown test of the power electronic transformer can be carried out stably and accurately, thereby ensuring the stability of the tester during long-term operation and extending its service life.

Description

Technical Field

[0001] The invention relates to a power electronic transformer breakdown tester, belonging to the technical field of transformer testers. Background Art

[0002] The power electronic transformer is a new type of transformer that integrates power electronic technology with traditional electromagnetic induction principles. It plays a key role in modern power systems. It can not only realize voltage conversion and electrical isolation, but also flexibly regulate electric energy. In the scenario where new energy is connected to the power grid, it can convert unstable new energy power generation into electric energy that meets the requirements of the power grid, effectively improving the quality of electric energy. At the same time, the power electronic transformer is small in size and light in weight, which can greatly save installation space and material costs.

[0003] When the existing power electronic transformer breakdown tester is in operation, a large amount of heat will be generated due to factors such as internal circuit loss, power device operation and energy conversion during the detection process. If the excessive heat cannot be dissipated in time, it will not only cause the performance of the internal components of the tester to deteriorate and shorten the service life, but may also cause failures, seriously affecting the accuracy and reliability of the test results. Although some current testers have heat dissipation measures, most of them have simple structures and limited heat dissipation efficiency, which cannot meet the heat dissipation requirements of long-term, high-load testing. If this excessive heat cannot be dissipated in a timely and effective manner, it may cause the performance of the components to gradually deteriorate, thereby greatly shortening the service life of the components, thereby increasing the maintenance cost and replacement frequency of the equipment.

[0004] Therefore, there is an urgent need to improve the power electronic transformer breakdown tester to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a power electronic transformer breakdown tester, which can transport the liquid in the water storage tank to the cooling coil through a water pump, and the liquid in the cooling coil is air-cooled through a cooling fan. The cooled liquid flows out from the cooling coil, enters the cooling pipe through a liquid outlet pipe, absorbs the heat generated during the test in the test tank, and the liquid after absorbing the heat flows back to the water storage tank of the cooling box through a reflux pipe. This cycle is repeated to form a complete cooling circulation system, which continuously cools the test process, prevents the tester from affecting the test results or damaging internal components due to excessive temperature, and ensures that the power electronic transformer breakdown test can be carried out stably and accurately, thereby ensuring the stability of the tester during long-term operation and extending its service life.

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include: A power electronic transformer breakdown tester comprises a tester body, a processing chamber is provided at the lower end of the tester body, a cooling mechanism is installed inside the processing chamber, and a test chamber is provided at the top end of the tester body, a clamping mechanism is installed inside the test chamber; The cooling mechanism includes a cooling box, which is fixedly mounted on the inner bottom surface of the processing bin, and a water storage bin and a cooling bin are provided inside the cooling box, a coil rack is fixedly arranged inside the cooling bin, a cooling coil is fixedly mounted on the coil rack, a cooling fan is arranged above the cooling coil, the cooling fan is fixedly mounted on the coil rack, one end of the cooling coil is connected to the cooling box, the other end of the cooling coil passes through the cooling box and is fixedly connected to a liquid outlet pipe, a water pump is fixedly mounted on the liquid outlet pipe, and one end of the liquid outlet pipe away from the cooling coil is fixedly connected to a cooling pipe, the other end of the cooling pipe is fixedly connected to a return pipe, and one end of the return pipe away from the cooling pipe is connected to the cooling box.

[0007] Preferably, a first grille is provided on the cooling bin, and the first grille is fixedly mounted on the upper end of the cooling box.

[0008] Preferably, a liquid inlet pipe is fixedly connected to one side of the water storage bin, and a solenoid valve is installed on the liquid inlet pipe.

[0009] Preferably, the cooling pipe is arranged inside the test chamber, and the cooling pipe is fixedly mounted on the inner wall of the test chamber by a plurality of pipe clamps.

[0010] Preferably, the clamping mechanism includes a clamping frame, which is fixedly installed inside the test chamber, and a clamping plate is installed on the clamping frame, a mounting groove is opened inside the clamping plate, a sleeve is fixedly installed on the inner bottom surface of the mounting groove, a sliding rod is arranged inside the sleeve, a limiting plate is installed on one end of the sliding rod, a spring is arranged below the limiting plate, one end of the spring is fixedly connected to the inner bottom surface of the sleeve, the other end of the spring is fixedly connected to the limiting plate, and the other end of the sliding rod passes through the sleeve and extends to the outside of the sleeve, and the end of the sliding rod located on the outside of the sleeve is fixedly connected to a carrying plate.

[0011] Preferably, the clamping mechanism includes a plurality of evenly distributed clamping blocks, the clamping blocks are hinged with connecting rods, and the ends of the plurality of connecting rods away from the clamping blocks are hinged with lifting plates, the lifting plates are fixedly mounted on the sliding rods, and the lifting plates are arranged below the carrying plate.

[0012] Preferably, the clamping plate is provided with a plurality of evenly distributed sliding grooves, and a plurality of the clamping blocks are slidably disposed inside the plurality of the sliding grooves, respectively.

[0013] Preferably, a through slot is provided at the center of the clamping disk, and the through slot corresponds to the carrying disk.

[0014] Preferably, a first fan is fixedly installed on the inner side of the processing chamber, a second grille is provided on one side of the first fan, the second grille is fixedly installed on the lower end of the tester body, and a second fan is fixedly installed on the upper end of the tester body.

[0015] Preferably, a first door is hinged on one side of the processing chamber, and a second door is hinged on one side of the testing chamber. A control panel is arranged between the first door and the second door. The control panel is fixedly mounted on the tester body, and a plurality of evenly distributed anti-collision pads are fixedly mounted around the tester body.

[0016] The present invention has at least the following beneficial effects: 1. The present invention transports the liquid in the water storage tank to the cooling coil through a water pump, and air-cools the liquid in the cooling coil through a cooling fan. The cooled liquid flows out of the cooling coil, enters the cooling pipe through a liquid outlet pipe, absorbs the heat generated during the test in the test chamber, and the liquid after absorbing the heat flows back to the water storage tank of the cooling box through a reflux pipe. This cycle is repeated to form a complete cooling circulation system, which continuously cools the test process, prevents the tester from affecting the test results or damaging internal components due to excessive temperature, and ensures that the breakdown test of the power electronic transformer can be carried out stably and accurately, thereby ensuring the stability of the tester during long-term operation and extending its service life.

[0017] 2. The present invention places the transformer to be breakdown tested on a carrying plate. The transformer relies on its own gravity to make the carrying plate press down the slide bar. The slide bar slides in the sleeve, compresses the spring below, and drives the lifting plate fixed on the slide bar to descend. Since a number of connecting rods are respectively hinged on the lifting plate and the clamping block, when the lifting plate descends, the several clamping blocks are respectively driven by the several connecting rods to slide toward the center in the slide groove, thereby tightly clamping the transformer from all sides. At this time, the carrying plate abuts against the through groove, thereby achieving a stable clamping of the transformer, ensuring that the position of the transformer is fixed during the breakdown test, avoiding the influence of shaking on the test results, and ensuring the accuracy and safety of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 A schematic diagram of the overall structure provided by the present invention; Figure 2 The internal schematic diagram of the overall structure provided by the present invention; Figure 3 A schematic diagram of a cooling mechanism provided by the present invention; Figure 4 A cross-sectional view of a cooling box provided by the present invention; Figure 5 A schematic diagram of the clamping mechanism provided by the present invention; Figure 6 An exploded schematic diagram of the clamping mechanism provided by the present invention; Figure 7 A partial structural cross-sectional view provided by the present invention; Figure 8 This is a cross-sectional view of the overall structure provided by the present invention.

[0019] In the figure, 1, the tester body; 2, the processing chamber; 3, the cooling mechanism; 31, the cooling box; 32, the water storage chamber; 33, the cooling chamber; 34, the coil rack; 35, the cooling coil; 36, the cooling fan; 37, the liquid outlet pipe; 38, the water pump; 39, the cooling pipe; 310, the return pipe; 4, the test chamber; 5, the clamping mechanism; 51, the clamping frame; 52, the clamping plate; 53, the mounting groove; 54, the sleeve; 55 , slide bar; 56, limit plate; 57, spring; 58, bearing plate; 59, clamping block; 510, connecting rod; 511, lifting plate; 512, slide groove; 513, through groove; 6, first grille; 7, liquid inlet pipe; 8, solenoid valve; 9, pipe clamp; 10, first fan; 11, second grille; 12, second fan; 13, first compartment door; 14, second compartment door; 15, control panel; 16, anti-collision pad. DETAILED DESCRIPTION

[0020] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0021] like Figure 1 - Figure 8 As shown, the power electronic transformer breakdown tester provided in this embodiment includes a tester body 1, a processing chamber 2 is opened at the lower end of the tester body 1, a cooling mechanism 3 is installed inside the processing chamber 2, and a test chamber 4 is opened at the top of the tester body 1, and a clamping mechanism 5 is installed inside the test chamber 4; The cooling mechanism 3 includes a cooling box 31, which is fixedly mounted on the inner bottom surface of the processing chamber 2, and a water storage chamber 32 and a cooling chamber 33 are provided inside the cooling box 31, a coil rack 34 is fixedly arranged inside the cooling chamber 33, a cooling coil 35 is fixedly mounted on the coil rack 34, a cooling fan 36 is arranged above the cooling coil 35, the cooling fan 36 is fixedly mounted on the coil rack 34, and one end of the cooling coil 35 is connected to the cooling box 31, the other end of the cooling coil 35 passes through the cooling box 31 and is fixedly connected to a liquid outlet pipe 37, a water pump 38 is fixedly mounted on the liquid outlet pipe 37, and one end of the liquid outlet pipe 37 away from the cooling coil 35 is fixedly connected to a cooling pipe 39, the other end of the cooling pipe 39 is fixedly connected to a return pipe 310, and the return pipe 310 is away from the cooling pipe 39. One end is connected to the cooling box 31, and the water pump 38 is turned on to transport the liquid in the water storage tank 32 to the cooling coil 35. The liquid in the cooling coil 35 is air-cooled by the cooling fan 36. The cooled liquid flows out of the cooling coil 35, enters the cooling pipe 39 through the liquid outlet pipe 37, absorbs the heat generated during the test in the test chamber 4, and the liquid after absorbing the heat flows back to the water storage tank 32 of the cooling box 31 through the reflux pipe 310. This cycle is repeated to form a complete cooling circulation system, which continuously cools the test process to prevent the tester from affecting the test results or damaging internal components due to excessive temperature, and ensures that the breakdown test of the power electronic transformer can be carried out stably and accurately, thereby ensuring the stability of the tester during long-term operation and extending its service life.

[0022] Further, such as Figure 1 - Figure 8 As shown, a first grille 6 is provided on the cooling bin 33, and the first grille 6 is fixedly mounted on the upper end of the cooling box 31. A liquid inlet pipe 7 is fixedly connected to one side of the water storage bin 32, and a solenoid valve 8 is installed on the liquid inlet pipe 7. The cooling pipe 39 is arranged inside the test bin 4, and the cooling pipe 39 is fixedly mounted on the inner wall of the test bin 4 through a plurality of pipe clamps 9. The first grille 6 can prevent debris from entering the cooling bin 33, ensure the normal operation of the cooling fan 36 and the cooling coil 35, and also guide the airflow to make the cooling more efficient; the liquid can be controlled to flow into the water storage bin 32 through the liquid inlet pipe 7 and the solenoid valve 8, so as to facilitate the replenishment of the coolant therein; and the cooling pipe 39 is fixed inside the test bin 4 through a plurality of pipe clamps 9, which can effectively absorb the heat generated in the test bin 4 due to the breakdown test of the power electronic transformer, thereby avoiding the influence of excessive temperature on the test accuracy and the stability of the equipment, thereby ensuring the smooth progress of the test.

[0023] Further, if Figure 1 - Figure 8As shown, the clamping mechanism 5 includes a clamping frame 51, which is fixedly installed inside the test chamber 4, and a clamping plate 52 is installed on the clamping frame 51, and a mounting groove 53 is opened inside the clamping plate 52, and a sleeve 54 is fixedly installed on the inner bottom surface of the mounting groove 53, and a sliding rod 55 is arranged inside the sleeve 54, and a limit plate 56 is installed at one end of the sliding rod 55, and a spring 57 is arranged below the limit plate 56, and one end of the spring 57 is fixedly connected to the inner bottom surface of the sleeve 54, and the other end of the spring 57 is fixedly connected to the limit plate 56. The other end of the slide bar 55 passes through the sleeve 54 and extends to the outside of the sleeve 54. The end of the slide bar 55 located outside the sleeve 54 is fixedly connected to the carrier plate 58. The clamping mechanism 5 includes a plurality of evenly distributed clamping blocks 59, and the clamping blocks 59 are hinged with connecting rods 510. The ends of the plurality of connecting rods 510 away from the clamping blocks 59 are hinged with lifting plates 511. The lifting plates 511 are fixedly mounted on the slide bar 55, and the lifting plates 511 are arranged below the carrier plate 58. The clamping plate 52 is opened. A plurality of evenly distributed slide grooves 512 are provided, and a plurality of clamping blocks 59 are respectively slidably arranged inside the plurality of slide grooves 512. A through groove 513 is provided at the center of the clamping plate 52. The through groove 513 corresponds to the carrying plate 58. When the transformer needs to be tested, it is placed on the carrying plate 58. The transformer relies on its own gravity to make the carrying plate 58 press down the slide bar 55. The slide bar 55 slides in the sleeve 54, compressing the spring 57 below, and at the same time driving the lifting plate 511 fixed on the slide bar 55 to descend. Since several connecting rods 510 are respectively hinged on the lifting plate 511 and the clamping block 59, when the lifting plate 511 descends, several clamping blocks 59 are driven by several connecting rods 510 to slide toward the center in the slide groove 512, thereby tightly clamping the transformer from all sides. At this time, the supporting plate 58 abuts against the through groove 513, thereby achieving a stable clamping of the transformer, ensuring that the position of the transformer is fixed during the breakdown test, avoiding the influence of shaking on the test results, and ensuring the accuracy and safety of the test.

[0024] Furthermore, Figure 1 - Figure 8 As shown, a first fan 10 is fixedly installed on the inner side of the processing chamber 2, a second grille 11 is arranged on one side of the first fan 10, the second grille 11 is fixedly installed on the lower end of the tester body 1, and a second fan 12 is fixedly installed on the upper end of the tester body 1. When the first fan 10 is running, the second grille 11 can block debris from entering the processing chamber 2, and at the same time make the wind blown out by the first fan 10 more uniform, promote air circulation in the processing chamber 2, and assist the cooling mechanism 3 in heat dissipation. The second fan 12 at the upper end of the tester body 1 can accelerate the air circulation in the test chamber 4, discharge the heat generated during the test in time, and maintain the temperature in the test chamber 4, thereby ensuring the smooth progress of the breakdown test of the power electronic transformer.

[0025] Further, such as Figure 1 - Figure 8 As shown, a first door 13 is hinged on one side of the processing chamber 2, a second door 14 is hinged on one side of the testing chamber 4, a control panel 15 is arranged between the first door 13 and the second door 14, the control panel 15 is fixedly mounted on the tester body 1, and a number of evenly distributed anti-collision pads 16 are fixedly mounted around the tester body 1, so that the first door 13 is convenient for replenishing the coolant in the water storage tank 32 in the cooling box 31, and it is also convenient for inspecting, maintaining and replacing parts of the cooling mechanism 3 in the processing chamber 2; the second door 14 is hinged on one side of the testing chamber 4, which is convenient for placing and removing the power electronic transformer to be tested; the control panel 15 can centrally control the operating parameters of the tester, making the operation more convenient, and the evenly distributed anti-collision pads 16 around the tester body 1 can prevent the tester body 1 from being accidentally collided during handling and transportation, protect the tester body 1 and its internal components, and thus reduce equipment damage caused by collision; like Figure 1 - Figure 8 As shown, the principle of a power electronic transformer breakdown tester provided in this embodiment is as follows: Open the second compartment door 14, place the transformer to be tested for breakdown on the carrier plate 58, and close the second compartment door 14. At this time, the transformer relies on its own gravity to make the carrier plate 58 press down the slide bar 55, and the slide bar 55 slides in the sleeve 54, compressing the spring 57 below, and at the same time driving the lifting plate 511 fixed on the slide bar 55 to descend. Since a number of connecting rods 510 are respectively hinged on the lifting plate 511 and the clamping block 59, when the lifting plate 511 descends, the several clamping blocks 59 are respectively driven by the several connecting rods 510 to slide toward the center in the slide groove 512, thereby tightly clamping the transformer from all sides. At this time, the carrier plate 58 is against the through groove 513, thereby achieving a stable clamping of the transformer, and then the control panel 15 is opened to perform a breakdown test on the transformer. During the breakdown test of the transformer, the water pump 38 is turned on to transport the liquid in the water storage tank 32 to the cooling coil 35. The liquid in the cooling coil 35 is air-cooled by the cooling fan 36. The cooled liquid flows out of the cooling coil 35 and enters the cooling pipe 39 through the liquid outlet pipe 37 to absorb the heat generated during the test in the test chamber 4. The liquid after absorbing the heat then flows back to the water storage tank 32 of the cooling box 31 through the reflux pipe 310. This cycle is repeated to form a complete cooling circulation system, thereby continuously cooling the test process.

[0026] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0027] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0028] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A power electronic transformer breakdown tester, comprising a tester body (1), characterized in that: A processing chamber (2) is provided at the lower end of the tester body (1), a cooling mechanism (3) is installed inside the processing chamber (2), and a testing chamber (4) is provided at the top end of the tester body (1), a clamping mechanism (5) is installed inside the testing chamber (4); The cooling mechanism (3) comprises a cooling box (31), the cooling box (31) being fixedly mounted on the inner bottom surface of the processing chamber (2), and the cooling box (31) being provided with a water storage chamber (32) and a cooling chamber (33) inside, a coil rack (34) being fixedly mounted inside the cooling chamber (33), a cooling coil (35) being fixedly mounted on the coil rack (34), a cooling fan (36) being arranged above the cooling coil (35), the cooling fan (36) being fixedly mounted on the coil rack (34), and the cooling coil One end of the cooling coil (35) is connected to the cooling box (31), the other end of the cooling coil (35) passes through the cooling box (31) and is fixedly connected to a liquid outlet pipe (37), a water pump (38) is fixedly installed on the liquid outlet pipe (37), and one end of the liquid outlet pipe (37) away from the cooling coil (35) is fixedly connected to a cooling pipe (39), the other end of the cooling pipe (39) is fixedly connected to a return pipe (310), and one end of the return pipe (310) away from the cooling pipe (39) is connected to the cooling box (31).

2. A power electronic transformer breakdown tester according to claim 1, characterized in that: The cooling bin (33) is provided with a first grille (6), and the first grille (6) is fixedly mounted on the upper end of the cooling box (31).

3. A power electronic transformer breakdown tester according to claim 2, characterized in that: A liquid inlet pipe (7) is fixedly connected to one side of the water storage bin (32), and a solenoid valve (8) is installed on the liquid inlet pipe (7).

4. A power electronic transformer breakdown tester according to claim 3, characterized in that: The cooling pipe (39) is arranged inside the test chamber (4), and the cooling pipe (39) is fixedly mounted on the inner wall of the test chamber (4) via a plurality of pipe clamps (9).

5. A power electronic transformer breakdown tester according to claim 4, characterized in that: The clamping mechanism (5) comprises a clamping frame (51), the clamping frame (51) being fixedly mounted inside the test chamber (4), and a clamping disc (52) being mounted on the clamping frame (51), a mounting groove (53) being provided inside the clamping disc (52), a sleeve (54) being fixedly mounted on the inner bottom surface of the mounting groove (53), a sliding rod (55) being arranged inside the sleeve (54), a limiting disc (56) being mounted on one end of the sliding rod (55), a spring (57) being arranged below the limiting disc (56), one end of the spring (57) being fixedly connected to the inner bottom surface of the sleeve (54), the other end of the spring (57) being fixedly connected to the limiting disc (56), and the other end of the sliding rod (55) passing through the sleeve (54) and extending to the outside of the sleeve (54), and one end of the sliding rod (55) located outside the sleeve (54) being fixedly connected to a bearing disc (58).

6. A power electronic transformer breakdown tester according to claim 5, characterized in that: The clamping mechanism (5) comprises a plurality of evenly distributed clamping blocks (59), the clamping blocks (59) being hinged with connecting rods (510), the ends of the plurality of connecting rods (510) away from the clamping blocks (59) being hinged with lifting plates (511), the lifting plates (511) being fixedly mounted on the sliding rod (55), and the lifting plates (511) being arranged below the carrying plate (58).

7. A power electronic transformer breakdown tester according to claim 6, characterized in that: The clamping plate (52) is provided with a plurality of evenly distributed sliding grooves (512), and a plurality of the clamping blocks (59) are respectively slidably disposed inside the plurality of the sliding grooves (512).

8. A power electronic transformer breakdown tester according to claim 7, characterized in that: A through slot (513) is provided at the center of the clamping plate (52), and the through slot (513) corresponds to the carrying plate (58).

9. A power electronic transformer breakdown tester according to claim 8, characterized in that: A first fan (10) is fixedly mounted on the inner side of the processing chamber (2), a second grille (11) is provided on one side of the first fan (10), the second grille (11) is fixedly mounted on the lower end of the tester body (1), and a second fan (12) is fixedly mounted on the upper end of the tester body (1).

10. A power electronic transformer breakdown tester according to claim 9, characterized in that: A first door (13) is hingedly connected to one side of the processing chamber (2), a second door (14) is hingedly connected to one side of the testing chamber (4), a control panel (15) is arranged between the first door (13) and the second door (14), the control panel (15) is fixedly mounted on the tester body (1), and a plurality of evenly distributed anti-collision pads (16) are fixedly mounted around the four sides of the tester body (1).

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