A high-altitude testing clamp for direct-current resistance test of a transformer

Abstract

The utility model provides a kind of transformer DC resistance test high-altitude test forceps, belongs to transformer resistance test technical field, including stem, top seat, base, test forceps chuck head, two stems adjacent between upper and lower are detachably connected by connecting assembly;Connecting assembly includes hollow cylinder.The utility model can realize the connection between two groups of adjacent stems and the locking after connection, ensure that the relative rotation between two groups of adjacent stems after connection does not occur, to ensure the stability and reliability of the overall equipment when assembling and subsequent application, ensure the normal development of detection work, and the assembly and disassembly steps between two groups of adjacent stems are simple and fast, and the assembling and disassembly efficiency is high, more conducive to the rapid and effective detection work, in addition, the handle is set to provide more convenient operating space for operator to hold stem, provide more stable operating environment for detection operation, and according to the operation habit of different operators or different operation sites.

Description

Technical Field

[0001] This utility model belongs to the field of transformer resistance testing technology, specifically relating to a high-altitude test clamp for testing the DC resistance of transformers. Background Technology

[0002] The high-altitude test clamp for transformer DC resistance testing is mainly used for conducting DC resistance tests on transformers in high-altitude environments. It allows testers to accurately connect the transformer's test points at heights, ensuring the continuity of the test circuit. It can accurately measure the DC resistance of the transformer windings, determine whether there are short circuits, open circuits, or other problems in the windings, and ensure the safe operation and performance testing of the transformer.

[0003] A related technology (publication number CN208953565U) discloses a high-altitude testing clamp device for transformer DC resistance testing, comprising a hand grip, an extension rod, and clamps, wherein the clamps are connected to the top of the hand grip, and the extension rod is movably connected to the bottom of the hand grip. Workers can stand on the transformer and directly clamp the device onto the bushing lugs, avoiding climbing the bushing or using aerial work platforms, reducing operational risks, saving manpower and resources, and improving work efficiency.

[0004] See Figure 7 As shown, in existing high-altitude testing clamp structures, adjacent rods are connected by threaded sleeves to adjust the total length of the rods and meet the testing requirements of different height locations. However, this connection method lacks an effective locking mechanism. When the two rods are subjected to external forces and rotate in opposite directions, the threaded connection is prone to loosening, leading to slippage between the two rods. This severely affects the stability and reliability of the overall testing equipment and interferes with the normal operation of the testing work. Utility Model Content

[0005] To address the shortcomings of existing technologies where adjacent rods are connected via threaded connections, lacking an effective locking mechanism, the threaded connection is prone to loosening when two rods rotate relative to each other under external force. This can lead to slippage, severely impacting the stability and reliability of the overall testing equipment and interfering with normal testing operations. This invention provides a high-altitude testing clamp for transformer DC resistance testing. It enables connection and locking between adjacent rods, preventing relative rotation and ensuring the stability and reliability of the entire equipment during assembly and subsequent application. This guarantees normal testing operations. Furthermore, the assembly and disassembly steps between adjacent rods are simple and quick, resulting in high efficiency and facilitating rapid and effective testing. The specific technical solution is as follows:

[0006] A transformer DC resistance test clamp for high-altitude testing includes a rod body, a top seat, a base, and a test clamp clamp head. Two adjacent rod bodies are detachably connected by a connecting assembly.

[0007] The connecting assembly includes a hollow cylinder with four positioning pins slidably arranged in the horizontal direction. Each pair of positioning pins is arranged symmetrically on the left and right. A spring is installed between each pair of positioning pins. One end of a connecting rod is vertically installed on the side wall of each positioning pin. A drive rod is vertically installed on the other end of the connecting rod. The drive rod is pluggably embedded in the inner cavity of the hollow cylinder. A first connecting plate is fixedly installed between two drive rods arranged vertically and vertically.

[0008] The rod body has a positioning hole on its side wall that corresponds to the position of the positioning pin. The positioning pin is insertably embedded in the cavity of the positioning hole. The rod body has a slot on the side opposite to the hollow cylinder. The hollow cylinder is insertably embedded in the cavity of the slot.

[0009] In the above technical solution, the test clamp head, the top seat, several connected rods, and the base are connected sequentially from top to bottom.

[0010] In the above technical solution, the rod at the top end is detachably connected to the top seat through the connecting assembly, and the rod at the bottom end is detachably connected to the base through the connecting assembly.

[0011] In the above technical solution, a fixing seat is fixedly installed at the bottom of the base, and a handle is provided at the bottom of the fixing seat.

[0012] In the above technical solution, the handle is adjusted vertically or horizontally via an adjustment component;

[0013] The adjustment assembly includes a clearance groove formed in the side wall of the fixed seat, and a fixed arm fixedly installed in the inner cavity of the fixed seat. A rotating arm is rotatably connected to the bottom end of the fixed arm, and the bottom end of the rotating arm is fixedly connected to the handle.

[0014] The rotating arm is rotatably embedded within the cavity of the clearance groove.

[0015] In the above technical solution, a locking component is provided on the side wall of the fixed base;

[0016] The locking assembly includes a first insert rod and a second insert rod that are slidably inserted into the side wall of the fixed base. The first insert rod and the second insert rod are arranged in parallel. A second connecting plate is installed between the first insert rod and the second insert rod. A first insertion hole corresponding to the position of the first insert rod is opened on the fixed arm. A second insertion hole corresponding to the position of the second insert rod is opened on the rotating arm.

[0017] The first insertion rod is pluggable into the inner cavity of the first insertion hole, and the second insertion rod is pluggable into the inner cavity of the second insertion hole.

[0018] In the above technical solution, the side wall of the fixed base has two through holes, and the two through holes correspond to the positions of the second insertion rod before and after rotation.

[0019] The transformer DC resistance testing clamp of this utility model has the following advantages compared with the prior art:

[0020] I. The existing connection between adjacent rods via threaded sleeves lacks an effective locking mechanism. When two rods are subjected to external force and rotate relative to each other, the threaded connection is prone to loosening, leading to slippage and severely impacting the stability and reliability of the overall testing equipment, thus interfering with the normal operation of testing. This invention addresses this problem by setting positioning holes and positioning pins between adjacent rods, enabling connection and locking between adjacent groups of rods. This ensures that the two groups of rods do not rotate relative to each other after connection, guaranteeing the stability and reliability of the overall equipment during assembly and subsequent application, and ensuring the normal operation of testing.

[0021] II. By setting components such as springs, positioning pins, and drive rods, this utility model can cause the four positioning pins in each hollow cylinder to simultaneously disengage from the corresponding positioning hole cavity, thereby realizing the disassembly between two adjacent sets of rods. The assembly and disassembly steps between two adjacent sets of rods are simple and quick, with high assembly and disassembly efficiency, which is more conducive to the rapid and effective conduct of testing.

[0022] Third, this utility model is also equipped with a handle, which provides a more convenient operating space for operators to grip the rod and a more stable operating environment for the inspection operation. Compared with the method of directly gripping the rod, it is more conducive to the safe and efficient conduct of the inspection operation.

[0023] Fourth, this utility model is equipped with an angle adjustment function for the handle, which enables the handle to be set vertically or horizontally, so as to flexibly adjust the position of the handle according to the operating habits of different operators or the limitations of different operating locations, so as to achieve the purpose of holding the handle at different angles and ensuring that the rod is in the vertical direction, and ensuring that the base at the top of the top seat is in the correct detection position with a relatively vertical orientation.

[0024] In summary, this utility model enables the connection and locking of two adjacent sets of rods, ensuring that there is no relative rotation between the two sets of rods after connection. This ensures the stability and reliability of the overall equipment during assembly and subsequent application, guaranteeing the normal operation of the testing work. Furthermore, the assembly and disassembly steps between the two sets of rods are simple and quick, with high assembly and disassembly efficiency, which is more conducive to the rapid and effective conduct of the testing work. In addition, the handle provides operators with a more convenient operating space to grip the rods, providing a more stable operating environment for the testing operation. Moreover, the handle can be adjusted to either a vertical or horizontal position according to different operators' operating habits or different operating locations, offering high flexibility. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the rod body of this utility model;

[0026] Figure 2 This is a schematic diagram of the hollow cylinder of this utility model when it is detached from the rod body.

[0027] Figure 3 This is a partial cross-sectional structural diagram of the hollow cylinder of this utility model;

[0028] Figure 4 This is a schematic diagram of the through hole structure of this utility model;

[0029] Figure 5 This is a partial cross-sectional structural diagram of the fixing base of this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the present invention when the handle is adjusted to a horizontal state;

[0031] Figure 7 This is a schematic diagram of the existing threaded connection between two adjacent rods.

[0032] Figures 1 to 6 In the middle, 1. rod body, 2. top seat, 3. base, 4. test clamp chuck, 5. positioning hole, 6. hollow cylinder, 7. positioning pin, 8. spring, 9. drive rod, 10. connecting rod, 11. first connecting plate, 12. slot, 13. fixed seat, 14. clearance groove, 15. fixed arm, 16. rotating arm, 17. handle, 19. first insertion rod, 21. second connecting plate, 22. second insertion rod, 23. first insertion hole, 24. second insertion hole, 25. through hole. Detailed Implementation

[0033] The following are specific implementation cases and appendices. Figures 1 to 6 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0034] See Figures 1 to 6As shown, a high-altitude test clamp for transformer DC resistance testing includes a rod body 1, a top seat 2, a base 3, and a test clamp 4. Two adjacent rod bodies 1 are detachably connected by a connecting assembly. The connecting assembly includes a hollow cylinder 6, on which four positioning pins 7 are slidably arranged in a horizontal direction. Each pair of positioning pins 7 is arranged symmetrically on both sides. A spring 8 is installed between each pair of positioning pins 7. One end of a connecting rod 10 is vertically installed on the side wall of each positioning pin 7, and a drive rod 9 is vertically installed on the other end of the connecting rod 10. The drive rod 9 is pluggably embedded in the inner cavity of the hollow cylinder 6. A first connecting plate 11 is fixedly installed between two corresponding drive rods 9. The side wall of the rod body 1 has a positioning hole 5 corresponding to the position of the positioning pin 7. The positioning pin 7 is pluggably embedded in the inner cavity of the positioning hole 5. A slot 12 is opened on the side of the rod body 1 opposite to the hollow cylinder 6. The hollow cylinder 6 is pluggably embedded in the inner cavity of the slot 12.

[0035] Pressing the first connecting plate 11 towards the hollow cylinder 6 causes the two drive rods 9 connected to the first connecting plate 11 to drive the corresponding springs 8 to compress, and causes the connecting rod 10 to move towards the center of the hollow cylinder 6. This allows the four locating pins 7 that are slidably set at the hollow cylinder 6 to retract synchronously towards the inner cavity of the hollow cylinder 6. After the retracted locating pins 7 and the hollow cylinder 6 as a whole move and insert into the slots 12 at the corresponding positions of the rods 1, the pressure on the first connecting plate 11 is removed. Under the elastic force of the springs 8, the locating pins 7 at the corresponding positions are automatically inserted outward into the inner cavity of the corresponding positioning holes 5. This means that the upper and lower ends of the hollow cylinder 6 are respectively inserted into the slots 12 in the upper and lower rods 1, and the locating pins 7 horizontally penetrate the inner cavity of the corresponding positioning holes 5, thus achieving the limiting and locking of the hollow cylinder 6 after it is inserted into the inner cavity of the slots 12.

[0036] See Figure 1 As shown, the test clamp 4, top seat 2, several connected rods 1 and base 3 are connected sequentially from top to bottom to form a complete high-altitude test clamp for transformer DC resistance testing. It is worth noting that in this application, the rods 1, top seat 2, base 3 and test clamp 4 are all existing equipment. Through the cooperation of the above components, the DC resistance test of the transformer can be realized. They adopt commercially available models, and the connection relationship between them is also existing technology, which can meet the normal testing requirements. The model of the above existing components will not be limited or described in detail here.

[0037] In addition, see Figure 1 As shown, the rod 1 at the top and the top seat 2 are detachably connected by a connecting assembly, and the rod 1 at the bottom and the base 3 are detachably connected by a connecting assembly. The connecting assembly enables the connection between the adjacent components.

[0038] Main references Figure 1As described above, a fixed base 13 is fixedly installed at the bottom of the base 3, and a handle 17 is provided at the bottom of the fixed base 13. When in use, the handle 17 can provide a more stable grip space for manual inspection operations by holding the handle by hand.

[0039] Main references Figures 4 to 6 As shown, the handle 17 can be adjusted vertically or horizontally via an adjustment assembly. The adjustment assembly includes a clearance groove 14 formed on the side wall of the fixed base 13, and a fixed arm 15 fixedly installed in the inner cavity of the fixed base 13. A rotating arm 16 is rotatably connected to the bottom end of the fixed arm 15, and the bottom end of the rotating arm 16 is fixedly connected to the handle 17. The rotating arm 16 is rotatably embedded in the inner cavity of the clearance groove 14. The clearance groove 14 provides sufficient clearance space for the rotating arm 16 to rotate to the horizontal position.

[0040] A locking assembly is provided on the side wall of the fixed base 13; the locking assembly includes a first insert rod 19 and a second insert rod 22 that are slidably inserted into the side wall of the fixed base 13. The first insert rod 19 and the second insert rod 22 are arranged in parallel. A second connecting plate 21 is installed between the first insert rod 19 and the second insert rod 22. A first insertion hole 23 corresponding to the position of the first insert rod 19 is opened on the fixed arm 15, and a second insertion hole 24 corresponding to the position of the second insert rod 22 is opened on the rotating arm 16; wherein, the first insert rod 19 is pluggably inserted into the cavity of the first insertion hole 23, and the second insert rod 22 is pluggably embedded in the cavity of the second insertion hole 24; two through holes 25 are provided on the side wall of the fixed base 13, and the two through holes 25 correspond to the positions of the second insert rod 22 before and after rotation, respectively;

[0041] Pulling the first insertion rod 19 outward causes it to disengage from the inner cavity of the first insertion hole 23. At the same time, the second connecting plate 21 drives the second insertion rod 22 to disengage from the inner cavity of the second insertion hole 24 and one of the through holes 25. Rotating the first insertion rod 19 causes the second connecting plate 21 and the second insertion rod 22 to rotate 90 degrees clockwise around the first insertion rod 19. At this time, the rotating arm 16 is perpendicular to the fixed arm 15. The second insertion rod 22 rotates to correspond to the position of the other through hole 25. With the help of external force, the first insertion rod 19 is re-inserted into the inner cavity of the first insertion hole 23, and the rotated second insertion rod 22 passes through the corresponding through hole 25 after rotation, and finally inserts into the inner cavity of the second insertion hole 24 on the rotated rotating arm 16. This achieves the locking of the first insertion rod 19 and the second insertion rod 22 on the rotated fixed arm 15 and the rotating arm 16. At this time, the handle 17 is in a horizontal position and perpendicular to the rod body 1, so as to adjust and lock the position of the handle 17 under different usage conditions.

[0042] The working principle of the high-altitude test clamp for testing the DC resistance of a transformer in this embodiment is as follows:

[0043] When assembling two adjacent sets of rods 1, the first connecting plate 11 is pressed towards the hollow cylinder 6, causing the two driving rods 9 connected to the first connecting plate 11 to drive the corresponding springs 8 to compress, and causing the connecting rod 10 to move towards the center of the hollow cylinder 6. This allows the four locating pins 7 slidably disposed at the hollow cylinder 6 to retract synchronously towards the inner cavity of the hollow cylinder 6. After the retracted locating pins 7 and the hollow cylinder 6 as a whole move and insert into the slots 12 at the corresponding positions of the rods 1, the pressure on the first connecting plate 11 is removed. Under the elastic force of the springs 8, the locating pins 7 at the corresponding positions are automatically inserted outward into the inner cavity of the corresponding locating holes 5. This means that the upper and lower ends of the hollow cylinder 6 are respectively inserted into the slots 12 in the upper and lower rods 1, and the locating pins 7 horizontally penetrate the inner cavity of the corresponding locating holes 5, achieving the limiting and locking of the hollow cylinder 6 after it is inserted into the inner cavity of the slots 12. Based on the above principle, the assembly connection and locking between two adjacent rods 1 can be achieved, as well as the connection and locking between rod 1 and base 3, and between rods 1 and rods 1.

[0044] In use, the handle 17 provides a more stable grip space for manual inspection operations. When the handle 17 needs to be adjusted to a horizontal position, the first insertion rod 19 is pulled outward to disengage it from the inner cavity of the first insertion hole 23. At the same time, the second connecting plate 21 drives the second insertion rod 22 to disengage from the inner cavity of the second insertion hole 24 and one of the through holes 25. Rotating the first insertion rod 19 causes the second connecting plate 21 and the second insertion rod 22 to rotate 90 degrees clockwise around the first insertion rod 19. At this time, the rotating arm 16 is perpendicular to the fixed arm 15. The clearance groove 14 allows the rotating arm 16 to rotate to a horizontal position. The device provides sufficient clearance. At this time, the second insertion rod 22 rotates to correspond to the position of another through hole 25. With the help of external force, the first insertion rod 19 is re-inserted into the inner cavity of the first insertion hole 23, and the rotated second insertion rod 22 passes through the corresponding through hole 25 after rotation, and finally inserts into the inner cavity of the second insertion hole 24 on the rotated rotating arm 16. This achieves the locking of the first insertion rod 19 and the second insertion rod 22 on the rotated fixed arm 15 and the rotating arm 16. At this time, the handle 17 is in a horizontal position and is perpendicular to the rod body 1, so as to adjust and lock the position of the handle 17 under different usage conditions.

[0045] This invention enables the connection and locking of two adjacent sets of rods 1, ensuring that there is no relative rotation between the two sets of rods 1 after connection. This ensures the stability and reliability of the overall equipment during assembly and subsequent application, guaranteeing the normal operation of the testing work. Furthermore, the assembly and disassembly steps between the two sets of rods 1 are simple and quick, with high assembly and disassembly efficiency, which is more conducive to the rapid and effective conduct of the testing work. In addition, the handle 17 provides a more convenient operating space for the operator to grip the rod 1, providing a more stable operating environment for the testing operation. Moreover, the handle 17 can be adjusted to either a vertical or horizontal position according to the operating habits of different operators or different operating locations, offering high flexibility.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-altitude test clamp for testing the DC resistance of a transformer, comprising a rod (1), a top seat (2), a base (3), and a test clamp clamp head (4), characterized in that: The two adjacent rods (1) are detachably connected by a connecting assembly; The connecting assembly includes a hollow cylinder (6), which has four positioning pins (7) slidably arranged in the horizontal direction. Each pair of positioning pins (7) is arranged symmetrically on the left and right. A spring (8) is installed between each pair of positioning pins (7). One end of a connecting rod (10) is vertically installed on the side wall of each positioning pin (7). A drive rod (9) is vertically installed on the other end of the connecting rod (10). The drive rod (9) is pluggably embedded in the inner cavity of the hollow cylinder (6). A first connecting plate (11) is fixedly installed between two drive rods (9) arranged vertically on the top and bottom. The rod (1) has a positioning hole (5) on its side wall corresponding to the position of the positioning pin (7). The positioning pin (7) is inserted into the cavity of the positioning hole (5). The rod (1) has a slot (12) on the side opposite to the hollow cylinder (6). The hollow cylinder (6) is inserted into the cavity of the slot (12).

2. The transformer DC resistance test clamp according to claim 1, characterized in that: The test clamp head (4), the top seat (2), several connected rods (1) and the base (3) are connected in sequence from top to bottom.

3. The transformer DC resistance test clamp according to claim 1, characterized in that: The rod (1) at the top is detachably connected to the top seat (2) via the connecting assembly, and the rod (1) at the bottom is detachably connected to the base (3) via the connecting assembly.

4. The transformer DC resistance test clamp according to claim 1, characterized in that: The base (3) is fixedly mounted with a fixed seat (13) at the bottom end, and a handle (17) is provided at the bottom end of the fixed seat (13).

5. The transformer DC resistance test clamp according to claim 4, characterized in that: The handle (17) can be adjusted vertically or horizontally via the adjustment component; The adjustment assembly includes a clearance groove (14) formed on the side wall of the fixed seat (13), and a fixed arm (15) fixedly installed in the inner cavity of the fixed seat (13). The bottom end of the fixed arm (15) is rotatably connected to a rotating arm (16), and the bottom end of the rotating arm (16) is fixedly connected to the handle (17). The rotating arm (16) is rotatably embedded in the cavity of the relief groove (14).

6. The transformer DC resistance test clamp according to claim 5, characterized in that: The side wall of the fixed base (13) is provided with a locking component; The locking assembly includes a first insert (19) and a second insert (22) that are slidably inserted into the side wall of the fixed base (13). The first insert (19) and the second insert (22) are arranged in parallel. A second connecting plate (21) is installed between the first insert (19) and the second insert (22). A first insertion hole (23) corresponding to the position of the first insert (19) is opened on the fixed arm (15), and a second insertion hole (24) corresponding to the position of the second insert (22) is opened on the rotating arm (16). The first insertion rod (19) is pluggable into the inner cavity of the first insertion hole (23), and the second insertion rod (22) is pluggable into the inner cavity of the second insertion hole (24).

7. The transformer DC resistance test clamp according to claim 6, characterized in that: The side wall of the fixed base (13) has two through holes (25), and the two through holes (25) correspond to the positions of the second insertion rod (22) before and after rotation.

Images