Test joint fixing structure and transformer interlayer insulation short circuit tester

Abstract

The utility model discloses a test joint fixing structure and a transformer interlayer insulation short circuit tester, and relates to the technical field of short circuit testers, the test joint fixing structure comprises a plurality of anti-drop assemblies, the anti-drop assemblies are used for preventing a test line and a tester from accidentally separating, and the anti-drop assemblies comprise adjustable anti-drop members; the adjustable anti-falling piece comprises a connector clamp, a supporting shell, a threaded rod, an inner threaded ring and a connecting threaded sleeve, and two guide grooves are formed in the supporting shell. According to the utility model, after the test wire joint is inserted into the test connecting hole, the joint clamp is used for clamping the inserted test joint, so that the test joint is prevented from being separated from or loosened from the test connecting hole, the test efficiency is prevented from being influenced by a phenomenon that a test needs to be retested due to test interruption, and the test efficiency is improved for test joints with different shapes and sizes. The threaded rod can drive the joint clamp to vertically lift by rotating the internal threaded ring, so that the joint clamp moves to a position where the test joint can be clamped, and the applicability of the joint clamp is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of short - circuit testers, and particularly relates to a fixed structure for test joints and a transformer inter - layer insulation short - circuit tester. Background Technique

[0002] A transformer is an electrical device used to change the magnitude of an alternating voltage. Through the principle of electromagnetic induction, it transforms the input voltage into an output voltage through mutual induction, thus realizing the step - up and step - down transformation of the voltage. A transformer short - circuit tester is a testing device specifically used to detect the short - circuit resistance of a transformer. When conducting a transformer short - circuit test, it is usually necessary to measure the short - circuit resistance of the transformer to ensure the normal operation and performance of the transformer. The transformer short - circuit tester can accurately measure the short - circuit resistance of the transformer and provide corresponding test data and analysis results.

[0003] After retrieval, a transformer low - voltage short - circuit impedance sweep tester with the publication number of CN210465545U includes a sweep tester. The sweep tester is arranged in a box. The sweep tester is provided with a grounding socket, an excitation source interface, a corresponding A interface, a corresponding B interface, and a USB interface. The sweep tester is provided with a power indicator light, a status indicator light, a power switch, and a test button. The sweep tester is provided with an emergency stop switch and a power interface. For this transformer low - voltage short - circuit impedance sweep tester, the low - voltage short - circuit impedance sweep test method can measure and obtain the short - circuit impedance value and frequency response characteristic curve of the transformer winding at one time. By comparing the current power - frequency short - circuit impedance value of the transformer with the nameplate value, and the differences between the current frequency response characteristic curve and the historical curve, the current state of the transformer winding can be effectively analyzed and judged, thus enabling rapid measurement.

[0004] In this published patent, during the test, the test joint can be directly inserted into the test interface to start the test. There is no further stable connection between the test joint and the test interface. If the test joint accidentally detaches from the test interface (such as accidental pulling), it will cause the test of the tester to be interrupted, requiring re - plugging and testing, wasting the test time before the interruption and affecting the test efficiency. Content of the Utility Model

[0005] The purpose of the utility model is to provide a fixed structure for test joints and a transformer inter - layer insulation short - circuit tester, which solves the problem that there is no further stable connection between the test joint and the test interface of the existing tester. If the test joint accidentally detaches from the test interface (such as accidental pulling), it will cause the test of the tester to be interrupted, wasting the test time and affecting the test efficiency.

[0006] The present utility model solves the above technical problems through the following technical solutions. The present utility model includes a plurality of anti-disconnection components, and the anti-disconnection components are used to prevent the test line and the tester from being accidentally separated. The anti-disconnection components include adjustable anti-disconnection parts;

[0007] The adjustable anti-disconnection part includes a connector clip, a support shell, a threaded rod, an internal thread ring, and a connecting thread sleeve. Two guiding grooves are provided inside the support shell. The threaded rod slides inside the support shell. The internal thread ring rotates on the top of the support shell. The threaded rod is threadedly connected to the inside of the internal thread ring. The connecting thread sleeve is fixed below the connector clip, and the connecting thread sleeve is threadedly connected to one end of the threaded rod.

[0008] Preferably, the anti-disconnection component further includes a retention and fine-tuning part, and the retention and fine-tuning part is used to quickly disassemble and assemble the adjustable anti-disconnection part and slightly adjust the direction of the connector clip.

[0009] Preferably, the retention and fine-tuning part includes a double-foot annular retention frame, a retention head, two special-shaped retention heads, and a small spring. An inner groove is provided inside the retention head;

[0010] The double-foot annular retention frame is fixed to the top of the tester. The retention head is fixed to the bottom of the support shell. The two special-shaped retention heads both slide inside the inner groove, and their outer ends extend out of the inner groove. Inclined surfaces are provided on the lower sides of the outer ends of the two special-shaped retention heads. The small spring is fixed between the two special-shaped retention heads.

[0011] The present utility model also provides a transformer interlayer insulation short-circuit tester, which includes a tester and a storage box, and further includes a plurality of the above-mentioned test joint fixing structures. A plurality of test connection holes are provided above the tester, and the plurality of test joint fixing structures are respectively located on one side of the plurality of test connection holes.

[0012] Preferably, a plurality of heat dissipation holes are provided on one side of the storage box.

[0013] Preferably, a lifting handle is fixed to the front of the storage box, and a sealing cover is hinged above the storage box.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. After the test line joint is inserted into the test connection hole, the inserted test joint is clamped by the connector clip to prevent the test joint from disengaging or loosening from the test connection hole, avoiding the phenomenon that the test needs to be retested due to test interruption, which affects the test efficiency. For test joints of different shapes and sizes, the internal thread ring can be rotated to drive the threaded rod to drive the connector clip to move vertically up and down, so that the connector clip moves to a position where it can clamp the test joint, improving its applicability.

[0016] 2. Manually press the two special-shaped retaining heads so that a part of the two special-shaped retaining heads (i.e., the parallel surface) enters the inner groove. Then, pull upward, and the special-shaped retaining heads will disengage from the double-foot annular retaining frame, completing the disassembly between the anti-disengagement component and the tester. During installation, just press the retaining heads into the inner side of the double-foot annular retaining frame. Under the thrust of the small spring, the parallel surface above the special-shaped retaining heads will be stuck under the double-foot annular retaining frame, enabling the quick assembly and disassembly of the anti-disengagement component and the tester. The rotation of the retaining heads in the double-foot annular retaining frame can adjust the orientation of the joint clip above the test connection hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the front view structural schematic diagram of the present utility model;

[0018] Figure 2 is the partial split cross-sectional view of the anti-disengagement component in the present utility model;

[0019] Figure 3 is the split schematic diagram of the adjustable anti-disengagement part and the retaining fine-tuning part in the present utility model.

[0020] The numbers in the figures represent:

[0021] 1. Anti-disengagement component; 11. Joint clip; 12. Support shell; 13. Threaded rod; 14. Internal thread ring; 15. Connecting thread sleeve; 16. Guide groove; 17. Double-foot annular retaining frame; 18. Retaining head; 19. Special-shaped retaining head; 110. Small spring; 111. Inner groove; 2. Tester; 3. Storage box; 4. Test connection hole; 5. Heat dissipation hole; 6. Pull handle; 7. Sealing cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further elaborates on the above and other technical features and advantages of the present utility model with reference to the accompanying drawings.

[0023] Embodiment 1

[0024] This embodiment provides a technical solution: a test joint fixing structure, as Figure 1 and Figure 2 shown, includes a plurality of anti-disengagement components 1. The number of anti-disengagement components 1 is determined according to the number of test connection holes 4. Each test connection hole 4 is equipped with an anti-disengagement component 1. In this embodiment, as Figure 1 shown, six test connection holes 4 are shown. The anti-disengagement component 1 is used to prevent the test wire and the tester 2 from being accidentally separated (such as accidentally pulling the test wire). The anti-disengagement component 1 includes an adjustable anti-disengagement part, which can adjust the height position of the joint clip 11 according to the shape and size of the connection head, and can also separately disassemble and replace the damaged joint clip 11 (such as when the torsion spring is fatigued, resulting in loss of elasticity and affecting the clamping effect).

[0025] AsFigure 2 As shown, the adjustable anti-disengagement component includes a joint clip 11, a support shell 12, a threaded rod 13, an internal thread ring 14, and a connecting thread sleeve 15. Two guiding grooves 16 are provided inside the support shell 12. The joint clip 11 uses a torsion spring to automatically close two clamping plates, thereby clamping the connection terminal to prevent the connection terminal from disengaging from the test connection hole 4. One end of the threaded rod 13 is fixed with two connecting feet, and the two connecting feet slide in the two guiding grooves 16 respectively, thereby restricting the threaded rod 13 so that the threaded rod 13 can slide vertically up and down inside the support shell 12. The internal thread ring 14 rotates on the top of the support shell 12, and the threaded rod 13 is threadedly connected to the inside of the internal thread ring 14. The connecting thread sleeve 15 is fixed below the joint clip 11, and the connecting thread sleeve 15 is threadedly connected to one end of the threaded rod 13. The connecting thread sleeve 15 is screwed onto the threaded rod 13 by threads, which facilitates the quick disassembly and assembly of the joint clip 11.

[0026] As Figures 1-3 shown, the anti-disengagement assembly 1 further includes a retention and fine-tuning component. The retention and fine-tuning component is used to quickly disassemble and assemble the adjustable anti-disengagement component and slightly adjust the direction of the joint clip 11. After any one of the anti-disengagement assembly 1 and the tester 2 is damaged, the two can be separated through the retention and fine-tuning component to prevent the associated loss caused by the fixed connection between the anti-disengagement assembly 1 and the tester 2. The retention and fine-tuning component includes a double-foot annular retention frame 17, a retention head 18, two special-shaped retention heads 19, and a small spring 110. An internal groove 111 is provided inside the retention head 18. The double-foot annular retention frame 17 is fixed on the top of the tester 2, and its position is close to and corresponds to the test connection hole 4. The retention head 18 is fixed on the bottom of the support shell 12. The two special-shaped retention heads 19 both slide inside the internal groove 111, and their outer ends extend out of the internal groove 111. The small spring 110 is fixed between the two special-shaped retention heads 19. When the small spring 110 is not under external pressure, one end of each of the two special-shaped retention heads 19 extends to the outside of the retention head 18, and the penetration part is a sliding connection. The shape of the special-shaped retention head 19 is as Figure 3 shown, the upper part is a parallel plane, and one side of the parallel plane is connected with two inclined planes that are inclined up and down. When the retention head 18 is pressed downward towards the inside of the double-foot annular retention frame 17, the special-shaped retention head 19 is forced to automatically retract into the internal groove 111 and form a clamping connection with the double-foot annular retention frame 17 to prevent the retention head 18 from disengaging from the double-foot annular retention frame 17.

[0027] Embodiment 2

[0028] This embodiment provides a technical solution: a transformer interlayer insulation short-circuit tester, which includes the test joint fixing structure in Embodiment 1, a tester 2, and a storage box 3. Above the tester 2, there are multiple test connection holes 4. On one side of the storage box 3, there are multiple heat dissipation holes 5 for the tester 2 to dissipate heat. A lifting handle 6 is fixed on the front of the storage box 3, and a sealing cover 7 is hinged above the storage box 3.

[0029] During use, insert the test line joint into the test connection hole 4, and use the joint clip 11 to hold the inserted test joint to prevent the test joint from detaching or loosening from the test connection hole 4, avoiding the phenomenon of having to retest due to test interruption, which affects the test efficiency. For test joints with different shapes and sizes, in order to better hold the test joint, the position of the joint clip 11 can be adjusted by rotating the internal thread ring 14 to make the threaded rod 13 vertically lift under the guiding and limiting of the guiding groove 16, so that the joint clip 11 moves to a position where it can hold the test joint, improving its applicability.

[0030] If the joint clip 11 is damaged (for example, the torsion spring becomes fatigued, resulting in loss of elasticity and affecting the clamping effect), the joint clip 11 can be directly rotated until the connecting thread sleeve 15 disengages from the threaded rod 13, and the joint clip 11 can be replaced separately. If either the anti-disengagement component 1 or the tester 2 is damaged, manually press the two special-shaped retaining heads 19. While pressing, pull the support shell 12 upward. When pressing the two special-shaped retaining heads 19, the small spring 110 is compressed, and a part of it (i.e., the parallel plane) enters the inner groove 111. When pulling upward, the inclined surface of the special-shaped retaining head 19 will slide along the inner edge of the double-foot annular retaining frame 17, and under the limiting and pushing of the inner edge of the double-foot annular retaining frame 17, the special-shaped retaining head 19 will be continuously pushed into the inner groove 111, and the retaining head 18 can be pulled out from the double-foot annular retaining frame 17 to complete the disassembly between the anti-disengagement component 1 and the tester 2. During installation, only need to press the retaining head 18 into the inner side of the double-foot annular retaining frame 17. The special-shaped retaining head 19 will slide into the inner groove 111 under the limitation of the edge of the double-foot annular retaining frame 17 until the retaining head 18 is completely pressed into the double-foot annular retaining frame 17. At this time, the special-shaped retaining head 19 is stuck in the double-foot annular retaining frame 17 under the thrust of the small spring 110. Under the limitation of the parallel plane above the special-shaped retaining head 19, the anti-disengagement component 1 is fixed on the tester 2, and the retaining head 18 can rotate and offset some angles in the double-foot annular retaining frame 17 to adjust the orientation of the joint clip 11 above the test connection hole 4.

[0031] The above are only the preferred embodiments of the present utility model, which are merely illustrative rather than restrictive to the present utility model. Those skilled in the art understand that many changes, modifications or even equivalents can be made to it within the spirit and scope defined by the claims of the present utility model, but all of them will fall within the protection scope of the present utility model.

Claims

1. A test joint fixing structure, characterized in that: The invention comprises an anti-slip assembly (1), wherein the anti-slip assembly (1) is used to prevent the test line and the tester (2) from accidentally separating, and the anti-slip assembly (1) comprises an adjustable anti-slip part; The adjustable anti-dropping component comprises a joint clamp (11), a support shell (12), a threaded rod (13), an internal threaded ring (14) and a connecting threaded sleeve (15); the support shell (12) is provided with two guide grooves (16) inside; the threaded rod (13) slides inside the support shell (12); the internal threaded ring (14) rotates on the top of the support shell (12); the threaded rod (13) is threadedly connected to the inside of the internal threaded ring (14); the connecting threaded sleeve (15) is fixed below the joint clamp (11); and the connecting threaded sleeve (15) is threadedly connected to one end of the threaded rod (13).

2. The test connector fixing structure according to claim 1, characterized in that: The anti-slip assembly (1) further comprises a retaining fine-tuning part, which is used to quickly disassemble and assemble the adjustable anti-slip part and slightly adjust the direction of the joint clamp (11).

3. The test connector fixing structure according to claim 2, characterized in that: The retaining fine-tuning member comprises a double-legged annular retaining frame (17), a retaining head (18), two special-shaped retaining heads (19) and a small spring (110); an inner groove (111) is provided inside the retaining head (18); The double-legged annular retaining frame (17) is fixed to the top of the tester (2), the retaining head (18) is fixed to the bottom of the supporting shell (12), the two special-shaped retaining heads (19) both slide inside the inner groove (111), and their outer ends extend out of the inner groove (111), the lower sides of the outer ends of the two special-shaped retaining heads (19) are both provided with inclined surfaces, and the small spring (110) is fixed between the two special-shaped retaining heads (19).

4. A transformer interlayer insulation short circuit tester, comprising a tester (2) and a storage box (3), characterized in that: It also comprises a plurality of test connector fixing structures as described in any one of claims 1 to 3, a plurality of test connection holes (4) are arranged above the tester (2), and the plurality of test connector fixing structures are respectively located on one side of the plurality of test connection holes (4).

5. The transformer interlayer insulation short-circuit tester according to claim 4, characterized in that: A plurality of heat dissipation holes (5) are provided on one side of the storage box (3).

6. The transformer interlayer insulation short-circuit tester according to claim 4, characterized in that: A lifting handle (6) is fixed on the front of the storage box (3), and a sealing cover (7) is hinged on the top of the storage box (3).

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