A portable transformer shorting release device

Abstract

The utility model relates to transformer short circuit technical field, concretely relates to a portable transformer short circuit release equipment including mounting panel, the lower end fixedly connected with a plurality of electric cylinders of mounting panel, the piston end of a plurality of electric cylinders all movably penetrates the upper end of mounting panel, and the piston end of a plurality of electric cylinders all is fixedly connected with pressure sensor, when needing to carry out short circuit test, start electric cylinder and make its piston end move upwards, synchronously drive pressure sensor, insulating isolation plate, a plurality of insulators, copper bar, mounting bracket and abutting block move upwards, abutting block and electrically conductive rod are pressed down, make electrically conductive rod finally with copper bar contact, subsequent current passes through abutting block, electrically conductive rod and copper bar contact and forms the passage, completes the short circuit test of transformer. After short circuit test, through control electric cylinder resets downwards can realize quick release process. Through above -mentioned design, improve the security, convenience and the degree of automation of entire short circuit, release process of test, reduce the hidden danger that test brings to test personnel.

Description

Technical Field

[0001] This utility model relates to the field of transformer short-circuit technology, specifically to a convenient transformer short-circuit release device. Background Technology

[0002] Power transformers are a major power supply device in the power grid. To ensure the safety of the power grid and equipment, it is necessary to test the safety performance of transformers. Among them, load loss test and temperature rise test are important test items.

[0003] The load loss test of the transformer is conducted by supplying power to the high-voltage side and short-circuiting the low-voltage winding terminals to bring the winding current to the rated current value, and then measuring the load loss. The temperature rise test of the transformer adopts the simulated load method and is carried out in accordance with the national standard "Power Transformers Part 1: General Rules" (GB / T1094.1) and the mechanical industry standard "Test Guidelines for Power Transformers" (JB / T 501). Both the load loss test and the temperature rise test of the transformer require the high-voltage winding to be carried with the rated current and the low-voltage winding to be short-circuited. That is, both tests require short-circuiting. During the load loss test and the temperature rise test of the transformer, the test personnel need to disassemble and assemble the test short-circuit copper busbar in a short time. After the temperature rise test, the temperature of the copper busbar at the low-voltage winding terminal and the short-circuit copper busbar of the transformer rises, which requires a very high level of skill from the test personnel. There is a risk of being burned by the copper busbar and there is also the problem of loose connection and unreliable fixation. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this utility model provides a convenient transformer short-circuit release device, which can effectively solve reliability and safety issues in existing test projects such as load loss tests and temperature rise tests, including loose connections, unreliable fixation, and burns to test personnel caused by copper busbars.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a convenient transformer short-circuit release device, including a mounting plate. Multiple electric cylinders are fixedly connected to the lower end of the mounting plate. The piston ends of the multiple electric cylinders movably extend through the upper end of the mounting plate, and pressure sensors are fixedly connected to the piston ends of the multiple electric cylinders. Insulating isolation plates are fixedly connected to the upper ends of the multiple pressure sensors. Insulators are fixedly connected to the upper ends of the multiple insulating isolation plates. Copper busbars are fixedly connected to the upper ends of the multiple insulators. The multiple copper busbars are flexibly connected to each other via flexible copper busbars. Multiple sets of pressure short-circuit mechanisms are provided. Each set of pressure short-circuit mechanisms consists of a mounting frame, a conductive rod, a spring, and a stop block. The mounting frame is slidably connected to one side of one of the insulating isolation plates. The conductive rod movably extends through the lower end of the mounting frame. The stop block is fixedly connected to the upper end of the conductive rod. The spring is sleeved on the circumferential surface of the conductive rod.

[0007] Furthermore, two anti-detachment plates are fixedly connected to the circumferential surface of the conductive rod, and both anti-detachment plates are located at the lower end of the mounting bracket.

[0008] Furthermore, it also includes multiple sets of position adjustment mechanisms. Each set of position adjustment mechanisms consists of a slider, a guide rail, a connecting plate, and a threaded rod. The guide rail is fixedly connected to one end of one of the insulating isolation plates. The slider is slidably connected to the outer surface of the guide rail. The connecting plate is fixedly connected to one end of the slider and is also fixedly connected to the mounting bracket. The threaded rod is threadedly connected to one end of the connecting plate.

[0009] Furthermore, a handle is fixedly connected to one end of the threaded rod, and an anti-disengagement groove is formed on the circumferential surface of the handle.

[0010] Furthermore, each of the multiple electric cylinders is equipped with a controller at one end, and there is a one-to-one signal connection between the multiple electric cylinders, the multiple controllers, and the multiple pressure sensors.

[0011] Furthermore, the upper end of the mounting plate is provided with multiple vertical holes, and the lower ends of the two insulating isolation plates are fixedly connected to two vertical rods. The mounting plate is slidably connected to the circumferential surface of the multiple vertical rods through the multiple vertical holes.

[0012] Furthermore, each of the electric cylinders has a mounting plate fixedly connected to its lower end.

[0013] Furthermore, infrared sensors are fixedly connected to the upper ends of multiple mounting brackets.

[0014] Beneficial effects

[0015] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0016] 1. When a short-circuit test is required, the electric cylinder is activated to move its piston upward, simultaneously driving the pressure sensor, insulating isolation plate, multiple insulators, copper busbar, mounting bracket, and abutment block upward. After the abutment block makes contact with the transformer, it continues to push upward. At this time, the abutment block and conductive rod are pressed down, so that the conductive rod finally makes contact with the copper busbar. The subsequent current forms a circuit through the contact between the abutment block, conductive rod, and copper busbar, completing the short-circuit test of the transformer. Through the above design, the convenience of the test is improved, the potential hazards to the test personnel are reduced, and the safety of the test is improved.

[0017] Second, when the insulating isolation plate is moved, it can drive the vertical rod to move in the vertical hole opened at the upper end of the mounting plate, thereby improving the vertical movement stability of the insulating isolation plate and thus improving the stability of the test. The device can be placed or installed through the mounting plate.

[0018] Third, in actual testing, after shorting and energizing, the shorting copper busbar needs to be released quickly, and the next resistance test program should be started in a very short time to ensure the accuracy of the measured data. Also, because the shorting copper busbar will generate heat after shorting and energizing, using equipment instead of manual labor can better meet the testing requirements and ensure safety and reliability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is the first front perspective view of the present invention;

[0021] Figure 2 This is a top perspective view of the present invention;

[0022] Figure 3 For the present utility model Figure 2 A magnified view of a section at point A in the middle;

[0023] Figure 4 This is a side perspective view of the present invention;

[0024] Figure 5 This is a rear-view perspective view of the present invention;

[0025] Figure 6 This is the second front perspective view of the present invention.

[0026] Reference numerals: 1. Mounting plate; 2. Electric cylinder; 3. Vertical rod; 4. Mounting plate; 5. Insulating isolation plate; 6. Copper busbar; 7. Insulator; 8. Connecting flexible copper busbar; 9. Pressure sensor; 10. Controller; 11. Mounting bracket; 12. Abutment block; 13. Spring; 14. Anti-detachment plate; 15. Conductive rod; 16. Slider; 17. Connecting plate; 18. Handle; 19. Threaded rod; 20. Infrared sensor; 21. Sleeve. Detailed Implementation

[0027] 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. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The present invention will be further described below with reference to the embodiments.

[0029] See attached document Figure 1-6 A convenient transformer short-circuit release device includes a mounting plate 1. Multiple electric cylinders 2 are fixedly connected to the lower end of the mounting plate 1. The piston ends of the multiple electric cylinders 2 movably extend through the upper end of the mounting plate 1, and pressure sensors 9 are fixedly connected to the piston ends of the multiple electric cylinders 2. Insulating isolation plates 5 are fixedly connected to the upper ends of the multiple pressure sensors 9. Insulators 7 are fixedly connected to the upper ends of the multiple insulating isolation plates 5. Copper busbars 6 are fixedly connected to the upper ends of the multiple insulators 7. The multiple copper busbars 6 are flexibly connected to each other via connecting flexible copper busbars 8. Multiple pressure short-circuit mechanisms are included. Each pressure short-circuit mechanism consists of a mounting frame 11, a conductive rod 15, a spring 13, and a stop block 12. The mounting frame 11 is slidably connected to one side of one of the insulating isolation plates 5. The conductive rod 15 movably extends through the lower end of the mounting frame 11. The stop block 12 is fixedly connected to the upper end of the conductive rod 15. The spring 13 is sleeved on the circumferential surface of the conductive rod 15.

[0030] In a specific embodiment of this utility model, when a short-circuit test is required, the electric cylinder 2 is activated to move its piston end, and simultaneously drives the pressure sensor 9, insulating isolation plate 5, insulator 7, copper busbar 6, mounting bracket 11, and abutment block 12 to move upward, so that the abutment block 12 abuts against the test end, and then continues to push upward. The abutment block 12 will move downward when it is abutted, and finally the conductive rod 15 will contact the copper busbar 6. The current flows through the abutment block 12 and the conductive rod 15 to the copper busbar 6, and is conducted to multiple copper busbars 6 through the connecting soft copper busbar 8 to form a circuit, thus completing the short-circuit energization test. Through the above design, the convenience of the test is improved, the potential hazards to the test personnel are reduced, and the safety of the test is improved.

[0031] Please refer to the details. Figure 1-6 Two anti-detachment plates 14 are fixedly connected to the circumferential surface of the conductive rod 15. Both anti-detachment plates 14 are located at the lower end of the mounting frame 11. The rod also includes multiple sets of position adjustment mechanisms. Each set of position adjustment mechanisms consists of a slider 16, a guide rail, a connecting plate 17, and a threaded rod 19. The guide rail is fixedly connected to one end of one of the insulating isolation plates 5. The slider 16 is slidably connected to the outer surface of the guide rail. The connecting plate 17 is fixedly connected to one end of the slider 16 and is fixedly connected to the mounting frame 11. The threaded rod 19 is threadedly connected to one end of the connecting plate 17.

[0032] In this embodiment: the anti-detachment plate 14 can prevent the conductive rod 15 from moving excessively and causing it to detach. In actual use, the position of the mounting bracket 11 can be changed by the cooperation of the slider 16 and the guide rail, thereby changing the position of the abutment block 12, which facilitates the calibration and positioning of the abutment block 12 with the power connection end. After the adjustment is completed, the threaded rod 19 is tightly abutted against one end of the guide rail by the rotation of the threaded rod 19 and the thread engagement, so that the connecting plate 17 and the mounting bracket 11 are fixed, which facilitates the timely adjustment of the abutment block 12 according to different power connection ends.

[0033] Please refer to the details. Figure 1-6 One end of the threaded rod 19 is fixedly connected to a handle 18. The circumferential surface of the handle 18 is provided with an anti-disengagement groove. One end of each of the multiple electric cylinders 2 is provided with a controller 10, and there is a one-to-one signal connection between the multiple electric cylinders 2, the multiple controllers 10 and the multiple pressure sensors 9.

[0034] In this embodiment: the threaded rod 19 can be easily rotated by the handle 18, and the pressure sensor 9 can sense the pressure of the lower end of the conductive rod 15 contacting the copper busbar 6. After the conductive rod 15 contacts the copper busbar 6, the pressure sensor 9 senses the pressure and transmits the signal to the controller 10. The controller 10 controls the electric cylinder 2 to close, thereby improving the contact accuracy of the short circuit test and making it easier to adapt to different lateral spacings of the electrical connection ends of different samples.

[0035] Please refer to the details. Figure 1-6 The upper end of the mounting plate 1 has multiple vertical holes. The lower ends of the two insulating isolation plates 5 are fixedly connected to two vertical rods 3. The mounting plate 1 is slidably connected to the circumferential surface of the multiple vertical rods 3 through the multiple vertical holes. The lower ends of the multiple electric cylinders 2 are all fixedly connected to the mounting plate 4. The upper ends of the multiple mounting brackets 11 are all fixedly connected to the infrared sensor 20.

[0036] In this embodiment: when the insulating isolation plate 5 moves, it can drive the vertical rod 3 to move in the vertical hole opened at the upper end of the mounting plate 1. The device can be placed and stabilized by the mounting plate 4. The distance between the mounting bracket 11 and the power terminal can also be detected by the infrared sensor 20, thereby assisting in closing the electric cylinder 2.

[0037] Preferably, the upper end of the mounting plate 1 is fixedly connected to a sleeve 21, and the vertical rod 3 moves synchronously within the sleeve 21 when it moves, thereby improving the vertical stability of the vertical rod 3.

[0038] Preferably, the pressure sensor 9 and the electric cylinder 2 are connected to achieve synchronous vertical movement. The combination of the two achieves vertical movement, contact, and pressing.

[0039] Preferably, in actual use, the transformer winding end is connected to an angle connector. The angle connector converts the contact surface into a horizontal plane, facilitating contact between the vertical surface of the transformer winding end and the abutment block 12, thereby improving the matching contact performance with the copper busbar 6. Because the transformer output copper busbar is vertical, it is inconvenient to short-circuit. Therefore, a right-angle adapter copper busbar is generally installed on the output copper busbar. The horizontal copper busbar facilitates contact with short-circuit equipment.

[0040] Working principle: When a short-circuit test is required (load loss test and temperature rise test of transformer), the electric cylinder 2 is activated to move its piston end, which simultaneously drives the pressure sensor 9, insulating isolation plate 5, insulator 7, copper busbar 6, mounting bracket 11, and abutment block 12 to move upward, so that the abutment block 12 abuts against the test end. Then, it continues to push upward, and the abutment block 12 moves downward due to the abutment, eventually making the conductive rod 15 contact the copper busbar 6. The current flows through the abutment block 12 and the conductive rod 15 to the copper busbar 6, and is conducted to multiple copper busbars 6 through the connecting flexible copper busbar 8, forming a circuit and completing the short-circuit energization test. Through the above design, the convenience of the test is improved, the hidden dangers of the test to the test personnel are reduced, and the safety of the test is improved.

[0041] After the transformer short-circuit test is completed, the short-circuit copper busbar needs to be released quickly, and the next resistance test program needs to be started in a very short time to ensure the accuracy of the measured data. To this end, this patent uses an electric cylinder 2 to reset it downwards, simultaneously driving the pressure sensor 9, insulating isolation plate 5, insulator 7, copper busbar 6, mounting bracket 11, and abutment block 12 downwards. This separates the abutment block 12 from the test end. The cylinder continues to reset downwards, and the abutment block 12 moves downwards due to the pressure, ultimately separating the conductive rod 15 from the copper busbar 6, achieving a rapid release action and eliminating the need for manual operation. Because the short-circuit copper busbar generates heat after the short circuit is energized, using equipment instead of manual labor better meets the testing requirements and ensures safety and reliability.

[0042] 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 will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A convenient transformer short-circuit release device, comprising a mounting plate (1), characterized in that: The lower end of the mounting plate (1) is fixedly connected to a plurality of electric cylinders (2). The piston ends of the plurality of electric cylinders (2) all extend through the upper end of the mounting plate (1). The piston ends of the plurality of electric cylinders (2) are fixedly connected to pressure sensors (9). The upper ends of the plurality of pressure sensors (9) are fixedly connected to insulating isolation plates (5). The upper ends of the plurality of insulating isolation plates (5) are fixedly connected to insulators (7). The upper ends of the plurality of insulators (7) are fixedly connected to copper busbars (6). The plurality of copper busbars (6) are... Multiple pressure short-circuit mechanisms are connected by a soft copper busbar (8). Each pressure short-circuit mechanism consists of a mounting frame (11), a conductive rod (15), a spring (13), and a stop block (12). The mounting frame (11) is slidably connected to one side of one of the insulating isolation plates (5). The conductive rod (15) moves through the lower end of the mounting frame (11). The stop block (12) is fixedly connected to the upper end of the conductive rod (15). The spring (13) is sleeved on the circumferential surface of the conductive rod (15).

2. The convenient transformer short-circuit release device according to claim 1, characterized in that, Two anti-detachment plates (14) are fixedly connected to the circumferential surface of the conductive rod (15), and both anti-detachment plates (14) are located at the lower end of the mounting frame (11).

3. A convenient transformer short-circuit release device according to claim 2, characterized in that, It also includes multiple sets of position adjustment mechanisms. Each set of position adjustment mechanisms consists of a slider (16), a guide rail, a connecting plate (17), and a threaded rod (19). The guide rail is fixedly connected to one end of one of the insulating isolation plates (5). The slider (16) is slidably connected to the outer surface of the guide rail. The connecting plate (17) is fixedly connected to one end of the slider (16) and is fixedly connected to the mounting bracket (11). The threaded rod (19) is threadedly connected to one end of the connecting plate (17).

4. A convenient transformer short-circuit release device according to claim 3, characterized in that, One end of the threaded rod (19) is fixedly connected to a handle (18), and the circumferential surface of the handle (18) is provided with an anti-dislodgement groove.

5. A convenient transformer short-circuit release device according to claim 4, characterized in that, Each of the multiple electric cylinders (2) is provided with a controller (10) at one end, and there is a one-to-one signal connection between the multiple electric cylinders (2), the multiple controllers (10) and the multiple pressure sensors (9).

6. A convenient transformer short-circuit release device according to claim 5, characterized in that, The upper end of the mounting plate (1) is provided with multiple vertical holes, and the lower ends of the two insulating isolation plates (5) are fixedly connected to two vertical rods (3). The mounting plate (1) is slidably connected to the circumferential surface of the multiple vertical rods (3) through the multiple vertical holes.

7. A convenient transformer short-circuit release device according to claim 6, characterized in that, Each of the electric cylinders (2) has a mounting plate (4) fixedly connected to its lower end.

8. A convenient transformer short-circuit release device according to claim 7, characterized in that, Infrared sensors (20) are fixedly connected to the upper ends of multiple mounting brackets (11).

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