Transformer no-load short circuit tester

Abstract

The utility model relates to the field of electrical technology, in particular to a transformer no-load short circuit tester. The transformer no-load short circuit tester provided by the utility model comprises a connecting plate, a tester, a display screen, a voltage regulator, a knob, a first wire holder and the like, a tester is mounted on one side of the connecting plate, a display screen is mounted at the top of the tester, a group of first wire holders, a group of second wire holders and a group of third wire holders are sequentially arranged on the tester, a voltage regulator is mounted on the other side of the connecting plate, and a knob is rotatably arranged at the top of the voltage regulator. During testing, the connecting rod is poked downwards, the second wire clamping plate and the first wire clamping plate clamp the wiring terminal at the input end of the transformer under the action of the torsion spring, so that a plurality of wiring clamps are connected at a time, the connecting rod is pushed upwards after testing is completed, the wiring terminal at the input end of the transformer is loosened, and then the wiring terminal is connected. Therefore, the purpose of disassembling a plurality of jointing clamps at one time is achieved, and the efficiency of wire connection during testing is improved.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to a transformer no-load short-circuit tester. Background Art

[0002] The transformer no-load short-circuit tester uses digital synchronous acquisition, which has the three characteristics of high efficiency, high accuracy and easy use. However, when measuring three-phase power consumption, due to the particularity of the equipment, the measurement requires carrying too many lines and other items, which is not convenient to carry and install.

[0003] The patent with authorization announcement number CN218240373U discloses a transformer fault no-load short-circuit tester, including a no-load short-circuit tester, the upper surface of which is rotatably connected to a protective cover, and the outer surface of which is fixedly connected to an auxiliary frame. The patent proposes that when the no-load short-circuit tester is placed for use, it is placed inside a magnetic iron sheet through universal wheels, and then the handle and the auxiliary frame are pulled together with the receiving frame to lift it, so as to achieve the purpose of making the no-load short-circuit tester convenient to carry as a whole. However, the above patent still has some shortcomings in actual use. When testing the transformer, the transformer, the tester and the voltage regulator need to be connected through wires, and the wires and the wire clamps need to be repeatedly disassembled when connecting and removing the wires, which makes the operation process of the transformer experiment more cumbersome and affects the transformer testing efficiency.

[0004] Therefore, it is necessary to design a transformer no-load short-circuit tester that can quickly connect and disassemble wires. Utility Model Content

[0005] In order to overcome the shortcomings of the existing patents that the wires and wire clamps need to be disassembled repeatedly when connecting and disassembling the wires during use, resulting in a cumbersome operation process when testing the transformer and affecting the transformer testing efficiency, the utility model provides a transformer no-load short-circuit tester that can quickly connect and disassemble the wires.

[0006] The technical solution is as follows: A transformer no-load short-circuit tester includes a connecting plate, a tester, a display screen, a voltage regulator, a knob, a first terminal block, a second terminal block and a third terminal block. The tester is installed on one side of the connecting plate, and a display screen is installed on the top of the tester. A group of first terminal blocks, a group of second terminal blocks and a group of third terminal blocks are arranged on the tester in sequence. A voltage regulator is installed on the other side of the connecting plate, and a knob is rotatably arranged on the top of the voltage regulator. It also includes a mounting plate, a first clamping plate, a second clamping plate, a first connecting rod, a torsion spring, a connecting rod and a second connecting rod. The connecting plate is installed with a mounting plate, and multiple first connecting rods are fixedly connected to the mounting plate, a first clamping plate is fixedly connected to the first connecting rod, a second clamping plate is rotatably arranged on the first connecting rod, and a torsion spring is connected between the first connecting rod and the second clamping plate, a second connecting rod is fixedly connected to the second clamping plate, and connecting rods are rotatably arranged on multiple second connecting rods.

[0007] Furthermore, it also includes a first guide rod, a first elastic member, a baffle, a second guide rod, a second elastic member and a rotary cover. The first guide rod is fixedly connected to the first terminal block and the second terminal block. The baffle is rotatably arranged on the first guide rod. The first elastic member is connected between the first guide rod and the baffle. The second guide rod is rotatably arranged on the second terminal block. The second elastic member is sleeved on the second guide rod. The baffle is rotatably installed on the second guide rod. A rotary cover for covering the plug-in hole is fixedly connected to the tester, and the rotary cover is threadedly matched with the plug-in hole on the third terminal block.

[0008] Furthermore, it also includes a mounting frame and a DC fan. The mounting frame is installed inside the tester, and the DC fan is installed inside the mounting frame.

[0009] Furthermore, it also includes a connecting frame, a servo motor and a transmission rod. The connecting frame is fixedly connected to the voltage regulator, the servo motor is installed on the connecting frame, the output shaft of the servo motor is connected to the transmission rod through a coupling, and the transmission rod is connected to the knob.

[0010] Furthermore, fins are included. The fins are installed on one side of the interior of the installation frame, and the fins extend to the outside of the tester.

[0011] Furthermore, a dustproof frame is included. A vent hole is opened on one side of the tester, and the dustproof frame is installed in the vent hole.

[0012] Furthermore, it also includes a pulley, a first handle and a second handle. The first handle is fixedly connected to the connecting plate, no less than two pulleys are installed at the bottom of the connecting plate, and the second handle is arranged at the bottom of the connecting rod.

[0013] The beneficial effects of the utility model are as follows: 1. When testing, the connecting rod is pushed downward, and under the action of the torsion spring, the second clamping plate and the first clamping plate clamp the wiring terminals at the input end of the transformer, thereby realizing the connection of multiple wiring clamps at one time. After the test is completed, the connecting rod is pushed upward to loosen the wiring terminals at the input end of the transformer, so as to achieve the purpose of disassembling multiple wiring clamps at one time and improve the efficiency of wire connection during testing.

[0014] 2. By starting the DC fan, the DC fan rotates to dissipate the heat generated during the operation of the tester, thereby preventing the tester from overheating during operation.

[0015] 3. After the transformer test is completed, the interfaces on the first and second wiring blocks are blocked by rotating the baffle, and then the rotary cover is rotated to block the interface on the third wiring block, thereby achieving the purpose of dust prevention for the interfaces on the first, second and third wiring blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the connecting plate, the pulley and the first handle of the utility model.

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the second handle, the first clamping plate and the second clamping plate of the utility model.

[0019] Figure 4 It is a three-dimensional cross-sectional structural schematic diagram of the dustproof frame and the third wiring seat of the utility model.

[0020] Figure 5 The utility model is a three-dimensional cross-sectional structural schematic diagram of the short-circuit tester and the rotary cover.

[0021] Figure 6 For this utility model Figure 5 Enlarged view of point A in the middle.

[0022] Figure 7 For this utility model Figure 5 Enlarged view of point B in the middle.

[0023] Figure 8 It is a three-dimensional cross-sectional structural schematic diagram of the installation frame, DC fan and fins of the utility model.

[0024] Figure numbers: 1_connecting plate, 2_pulley, 3_first handle, 4_mounting plate, 5_first clamping plate, 6_second clamping plate, 7_first connecting rod, 8_torsion spring, 9_connecting rod, 10_second connecting rod, 11_second handle, 12_tester, 1201_display screen, 1202_voltage regulator, 1203_knob, 13_first terminal block, 1301_second terminal block, 1302_third terminal block, 14_first guide rod, 15_first elastic member, 16_baffle, 17_second guide rod, 18_second elastic member, 19_screw cover, 20_mounting frame, 21_DC fan, 22_connecting frame, 23_servo motor, 24_transmission rod, 25_fin, 26_dustproof frame. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Embodiment 1: A transformer no-load short-circuit tester, see Figure 1-Figure 5 As shown, it includes a connecting plate 1, a tester 12, a display screen 1201, a voltage regulator 1202, a knob 1203, a first terminal block 13, a second terminal block 1301 and a third terminal block 1302. The tester 12 is installed on one side of the middle of the top of the connecting plate 1. A vent is provided on the left side of the tester 12. A dustproof frame 26 is installed in the vent. The vent is used to assist in heat dissipation of the tester 12. The dustproof frame 26 serves the purpose of dustproofing the vent. The display screen 1201 is installed on the top of the tester 12 by bolt connection. The tester 12 is connected to the display screen 1201 by signal. A group of first terminal blocks 13, a group of second terminal blocks 1301 and a group of third terminal blocks 1302 are arranged in sequence from left to right on the front of the tester 1. The number of each group of first terminal blocks 13, second terminal blocks 1301 and third terminal blocks 1302 is three. The connecting plate 1 A voltage regulator 1202 is installed on the left side of the top by bolt connection, and a knob 1203 is rotatably arranged on the top of the voltage regulator 1202, a plurality of first connecting rods 7 are fixedly connected to the mounting plate 4, a first clamping plate 5 is fixedly connected to the first connecting rod 7, a second clamping plate 6 is rotatably arranged on the first connecting rod 7, and a torsion spring 8 is connected between the first connecting rod 7 and the second clamping plate 6, a second connecting rod 10 is fixedly connected to the second clamping plate 6 by welding, and a connecting rod 9 is rotatably arranged on the plurality of second connecting rods 10, a first handle 3 is fixedly connected to the left side of the top on the connecting plate 1 by welding, four pulleys 2 are installed on the bottom of the connecting plate 1 by bolt connection, and the four pulleys 2 are distributed in a rectangular shape at the bottom of the connecting plate 1, a second handle 11 is arranged at the bottom of the connecting rod 9, and the effort of pushing the connecting rod 9 can be saved by pushing the second handle 11 up and down.

[0027] When using the transformer no-load short-circuit tester 12, push the first handle 3 to move the mounting plate 4 close to the transformer to be tested, push the connecting rod 9 downward to drive the second clamping plate 6 to separate from the first clamping plate 5, and the second clamping plate 6 drives the torsion spring 8 to deform. When the second clamping plate 6 and the first clamping plate 5 move to the terminal close to the input end of the transformer, release the connecting rod 9. The torsion spring 8 returns to its original state and drives the second clamping plate 6 to rotate in the opposite direction and reset, so that the second clamping plate 6 cooperates with the first clamping plate 5 to clamp the terminal at the input end of the transformer, thereby realizing the connection of multiple clamps at one time, improving the efficiency of wire connection during testing, and then connecting the terminal on the voltage regulator 1202 to the first terminal block 13 and the second terminal block 1301 on the tester 12 in turn, and connecting the voltage regulator 1202 to a 380V external power supply. Use a wire to connect the third terminal block 1302 to the output end of the transformer, and adjust the output voltage of the voltage regulator 1202 by turning the knob 1203, so as to adjust the input voltage of the transformer. The tester 12 tests the input, output voltage and current of the transformer, and displays the input, output voltage and current of the transformer on the display screen 1201. The tester reads and calculates the input, output voltage and current data of the transformer on the display screen 1201, so as to calculate the power loss of the transformer under no-load or short-circuit conditions. The tester uses this to determine whether the transformer is faulty. After the test is completed, the connecting rod 9 is pushed upward to loosen the second clamping plate 6 and the first clamping plate 5 to loosen the terminal at the input end of the transformer, so as to achieve the purpose of disassembling multiple clamps at one time and improve the efficiency of wire connection during testing.

[0028] Example 2: Based on Example 1, refer to Figure 5 and Figure 6 As shown, it also includes a first guide rod 14, a first elastic member 15, a baffle 16, a second guide rod 17, a second elastic member 18 and a rotary cover 19. The first guide rod 14 is fixedly connected to the first terminal block 13 and the second terminal block 1301 by welding. The baffle 16 is rotatably provided on the first guide rod 14. The first elastic member 15 is connected between the first guide rod 14 and the baffle 16. The second guide rod 17 is rotatably provided on the second terminal block 1301. The second elastic member 18 is sleeved on the second guide rod 17. The baffle 16 is rotatably installed on the second guide rod 17. A rotary cover 19 for covering the plug-in hole is fixedly connected to the tester 12. The rotary cover 19 is threadedly matched with the plug-in hole on the third terminal block 1302.

[0029] When the transformer test is completed, the baffle 16 is pulled forward, and the baffle 16 squeezes the first elastic member 15 to deform. The baffle 16 is then rotated. After the baffle 16 is released, the first elastic member 15 returns to its original state and drives the baffle 16 to move downward to block the interface on the first terminal block 13. Repeat the above operation to make the baffle 16 on the second terminal block 1301 block the interface on the second terminal block 1301, and then rotate the rotary cover 19 to make the rotary cover 19 block the interface on the third terminal block 1302, thereby achieving the purpose of dustproofing the interfaces on the first terminal block 13, the second terminal block 1301 and the third terminal block 1302.

[0030] See also Figure 8 As shown, it also includes a mounting frame 20 and a DC fan 21. The mounting frame 20 is installed inside the tester 12 by bolt connection, and the DC fan 21 is installed inside the mounting frame 20 by bolt connection. Fins 25 are installed on one side of the inside of the mounting frame 20 by bolt connection, and the fins 25 extend to the outside of the tester 12.

[0031] When the tester 12 is running, the DC fan 21 is started, and the DC fan 21 rotates to discharge the heat generated when the tester 12 is running. The heat emitted by the tester 12 is introduced into the fins 25 and then transferred from the fins 25 to the outside of the tester 12, thereby preventing the tester 12 from overheating during operation.

[0032] See also Figure 1 As shown, it also includes a connecting frame 22, a servo motor 23 and a transmission rod 24. The connecting frame 22 is fixedly connected to the top of the voltage regulator 1202 by welding, and the servo motor 23 is installed on the connecting frame 22 by bolt connection. The transmission rod 24 is connected to the output shaft of the servo motor 23 through a coupling, and the transmission rod 24 is connected to the knob 1203.

[0033] When the output voltage of the voltage regulator 1202 needs to be adjusted, the servo motor 23 is started, and the output shaft of the servo motor 23 drives the knob 1203 to rotate forward and reverse through the transmission rod 24, thereby realizing automatic adjustment of the output voltage of the voltage regulator 1202 and improving the safety of the test transformer when controlling short circuit.

[0034] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A transformer no-load short-circuit tester, comprising a connecting plate (1), a tester (12), a display screen (1201), a voltage regulator (1202), a knob (1203), a first terminal block (13), a second terminal block (1301) and a third terminal block (1302), wherein the tester (12) is installed on one side of the connecting plate (1), the display screen (1201) is installed on the top of the tester (12), a group of first terminal blocks (13), a group of second terminal blocks (1301) and a group of third terminal blocks (1302) are sequentially arranged on the tester (12), a voltage regulator (1202) is installed on the other side of the connecting plate (1), and a knob (1203) is rotatably arranged on the top of the voltage regulator (1202), characterized in that: It also includes a mounting plate (4), a first clamping plate (5), a second clamping plate (6), a first connecting rod (7), a torsion spring (8), a connecting rod (9) and a second connecting rod (10); the mounting plate (4) is mounted on the connecting plate (1); a plurality of first connecting rods (7) are fixedly connected to the mounting plate (4); a first clamping plate (5) is fixedly connected to the first connecting rod (7); a second clamping plate (6) is rotatably arranged on the first connecting rod (7); a torsion spring (8) is connected between the first connecting rod (7) and the second clamping plate (6); a second connecting rod (10) is fixedly connected to the second clamping plate (6); and a connecting rod (9) is rotatably arranged on the plurality of second connecting rods (10).

2. A transformer no-load short-circuit tester according to claim 1, characterized in that: The invention also comprises a first guide rod (14), a first elastic member (15), a baffle (16), a second guide rod (17), a second elastic member (18) and a rotary cover (19); the first guide rod (14) is fixedly connected to the first terminal block (13) and the second terminal block (1301); the baffle (16) is rotatably arranged on the first guide rod (14); the first elastic member (15) is connected between the first guide rod (14) and the baffle (16); the second guide rod (17) is rotatably arranged on the second terminal block (1301); the second elastic member (18) is sleeved on the second guide rod (17); the baffle (16) is rotatably installed on the second guide rod (17); the tester (12) is fixedly connected with a rotary cover (19) for covering the plug-in hole; the rotary cover (19) is threadedly matched with the plug-in hole on the third terminal block (1302).

3. A transformer no-load short-circuit tester according to claim 1, characterized in that: It also includes a mounting frame (20) and a DC fan (21). The mounting frame (20) is installed inside the tester (12), and the DC fan (21) is installed inside the mounting frame (20).

4. A transformer no-load short-circuit tester according to claim 1, characterized in that: It also includes a connecting frame (22), a servo motor (23) and a transmission rod (24); the connecting frame (22) is fixedly connected to the voltage regulator (1202); the servo motor (23) is installed on the connecting frame (22); the transmission rod (24) is connected to the output shaft of the servo motor (23) via a coupling; and the transmission rod (24) is connected to the knob (1203).

5. A transformer no-load short-circuit tester according to claim 1, characterized in that: It also includes a fin (25), which is installed on one side of the interior of the installation frame (20) and extends to the outside of the tester (12).

6. A transformer no-load short-circuit tester according to claim 1, characterized in that: A dustproof frame (26) is also included. A vent hole is opened on one side of the tester (12), and the dustproof frame (26) is installed in the vent hole.

7. A transformer no-load short-circuit tester according to claim 1, characterized in that: It also includes a pulley (2), a first handle (3) and a second handle (11); the first handle (3) is fixedly connected to the connecting plate (1); no less than two pulleys (2) are installed at the bottom of the connecting plate (1); and the second handle (11) is arranged at the bottom of the connecting rod (9).

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