A terminal post connecting device for transformer detection

Abstract

The utility model provides a kind of terminal post connecting device for transformer detection, it is related to transformer technical field.The utility model's terminal post has stud, coaxial with the top end of stud is equipped with the cylinder smaller than stud in diameter, is equipped with concave annular groove on cylinder.The utility model's connecting device is mainly composed of terminal, sleeve and compression spring, the lower end of terminal is equipped with the outer taper surface of big lower small and the elastic jaw of multiple petal for clamping concave annular groove, the upper end of terminal is connected with electric wire;Sleeve is sleeved on terminal, inner taper surface matched with outer taper surface is equipped on the lower end of sleeve, compression spring is used to apply direction downward thrust to sleeve.The utility model changes the structure of terminal post, sets concave annular groove on the top end of stud, and then realizes quick connection with terminal post by connecting device with elastic jaw.The utility model's connecting device has the characteristics of convenient disassembly and assembly, reliable connection, safe use, and greatly improves the detection efficiency of transformer.

Description

Technical Field

[0001] This utility model is specifically a terminal connection device for transformer testing, which relates to the field of transformer technology. Background Technology

[0002] Before leaving the factory, the transformer needs to be powered on for testing. At this time, a power cord needs to be connected to the input terminal of the transformer, and a testing device needs to be connected to the output terminal of the transformer.

[0003] See attached document Figure 1 The existing terminal 1 has a ceramic insulator 11 at the bottom and a stud 12 and a nut 13 at the top. Tightening the nut 13 allows for electrical connection to the power supply line or testing equipment. Transformers have multiple sets of terminals; the disadvantage of this connection method is that it is inconvenient to install and remove, and the testing efficiency is low.

[0004] Another connection method uses alligator clips to connect to the terminal block. The disadvantage of this method is that the alligator clips need to be clamped onto the stud, and the electric arc generated when energized can burn the threads. Furthermore, the clamping force of the alligator clips is limited; even slight external force can cause them to detach, posing a safety hazard during testing. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this utility model discloses a terminal connection device for transformer testing, adopting the following technical solution: A transformer testing terminal connection device includes a stud with a cylindrical body coaxially positioned at the top of the stud, the cylindrical body having a smaller diameter than the stud and a concave annular groove. The connection device mainly consists of a connecting tube, a sleeve, and a compression spring. The lower end of the connecting tube has an outer conical surface (larger at the bottom and smaller at the top) and multiple elastic claws for engaging the concave annular groove. The upper end of the connecting tube is connected to an electrical wire. The sleeve is fitted onto the connecting tube, and the lower end of the sleeve has an inner conical surface that mates with the outer conical surface. The compression spring applies a downward thrust to the sleeve.

[0006] Further improve the technical solution: The upper part of the connecting pipe and the sleeve are respectively provided with flanges, and the compression spring is installed axially between the flanges of the connecting pipe and the sleeve.

[0007] Further improve the technical solution: A pair of handles are symmetrically provided on the flanges of the conduit and sleeve.

[0008] Further technical improvements: An insulating rubber sleeve is installed on the handle.

[0009] Further improvement of the technical solution: The multi-lobed elastic claws are evenly distributed along the circumference of the connector, and the inner side of the elastic claws has a protrusion structure that matches the concave annular groove.

[0010] Further improve the technical solution: the taper of the outer and inner conical surfaces is 2-10°.

[0011] After implementing the above technical solution, the beneficial effects of this utility model compared to the prior art are: This invention changes the structure of the terminal block by setting a concave annular groove at the top of the stud, thereby enabling quick connection with the terminal block through a connecting device with elastic claws.

[0012] The tapered fit between the conduit and the sleeve amplifies the force, which is sufficient to firmly fix this connection device to the terminal block.

[0013] The protrusions on the elastic claws can fit perfectly into the concave annular grooves, thus preventing the generation of electric arcs.

[0014] The connection device of this utility model is characterized by convenient assembly and disassembly, reliable connection, and safe use, which greatly improves the testing efficiency of transformers. Attached Figure Description

[0015] Appendix Figure 1 The diagram shown is a structural schematic of an existing transformer terminal block.

[0016] Appendix Figure 2 The diagram shown is a structural schematic of the terminals of this transformer.

[0017] Appendix Figure 3 The diagram shown is a structural schematic of this connecting device.

[0018] Appendix Figure 4 The diagram shown is a structural schematic of the wiring conduit.

[0019] Appendix Figure 5 The diagram shown is a schematic of the sleeve structure.

[0020] Appendix Figure 6 The diagram shown is a structural schematic of the connection device before connection.

[0021] Appendix Figure 7 The diagram shown is a schematic of the structure of this connecting device after connection.

[0022] In the attached diagram: 1. Terminal; 11. Ceramic insulator; 12. Stud; 13. Nut; 14. Cylinder; 15. Concave annular groove; 2. Connecting tube; 21. Outer conical surface; 22. Elastic claw; 23. Flanged edge; 24. Wire; 3. Sleeve; 31. Inner conical surface; 32. Insulating sleeve; 4. Compression spring. Detailed Implementation

[0023] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. It should be noted that in the description of this utility model, terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation and positional relationship, and therefore should not be construed as a limitation of this utility model. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] A terminal connection device for transformer testing relates to the field of transformer technology. The composition and working principle of this utility model are described in detail below.

[0025] See attached document Figure 2 First, this invention improves the transformer terminal. The existing terminal 1 has a stud 12 and a nut 13 at its upper part. This invention provides a cylinder 14 coaxially at the top of the stud 12. The diameter of the cylinder 14 is smaller than the minimum diameter of the thread on the stud 12, and a concave annular groove 15 is provided on the cylinder 14. In this way, the cylinder 14 does not obstruct the installation and removal of the nut 13 on the stud 12.

[0026] See attached document Figure 3 This connection device mainly consists of a wiring conduit 2, a sleeve 3, and a compression spring 4. The sleeve 3 is fitted onto the wiring conduit 2, and the compression spring 4 is supported by the wiring conduit 2 and is used to apply a downward thrust to the sleeve 3.

[0027] See attached document Figure 4The connector 2 is made of copper alloy. At its lower end, there is a tapered surface 21, wider at the bottom and narrower at the top, with a taper of 2°. Six-lobed elastic claws 22 are also located at the lower end of the connector 2, evenly distributed along its circumference. The elastic claws 22 are formed by longitudinal slots and are elastic in the radial direction. They are used to engage with the concave annular groove 15 on the terminal block 1, and have matching protrusions on their inner sides. The upper end of the connector 2 is connected to the wire 24, and the other end of the wire 24 is connected to a power supply or testing equipment. A flange 23 is located at the upper part of the connector 2, and a pair of handles are symmetrically arranged on the flange 23, with insulating sleeves installed on the handles.

[0028] See attached document Figure 5 The lower end of the sleeve 3 is provided with an inner conical surface 31 that mates with the outer conical surface 21. The upper part of the sleeve 3 is provided with a flange. A pair of handles are symmetrically arranged on the flange of the sleeve 3, and an insulating rubber sleeve 32 is installed on the handle.

[0029] See attached document Figure 6 Before connection, apply pressure to the handle with your thumb and forefinger to overcome the elastic force of the compression spring 4 and move the sleeve 3 upward. At this time, the exposed length of the elastic claw 22 increases.

[0030] See attached document Figure 7 Place the lower end of the connector 2 onto the cylinder 14 of the terminal 1, and engage the elastic claw 22 within the concave annular groove 15 of the terminal 1. Then release the handle. At this point, under the action of the compression spring 4, the sleeve 3 moves downward, and through the engagement of the inner conical surface 31 and the outer conical surface 21, it applies an inward contraction force to the elastic claw 22, pressing the elastic claw 22 firmly within the concave annular groove 15, thereby achieving a quick connection between the connecting device and the terminal 1. As is known, the conical engagement has a force amplification effect; therefore, the inward contraction force applied to the elastic claw 22 by the conical engagement is much greater than the downward elastic force applied by the compression spring 4, which is sufficient to firmly fix the connecting device to the terminal 1. Furthermore, since the protrusion structure on the elastic claw 22 can completely fit into the concave annular groove 15, the generation of electric arc can be avoided.

[0031] After the transformer has been tested, you can easily remove this connection device from terminal 1 by simply pressing the handle again.

[0032] In summary, this connection device is easy to assemble and disassemble, and provides a reliable connection, significantly improving the testing efficiency of transformers.

[0033] It is worth noting that the content not described in detail in the above embodiments is prior art. It is also worth noting that any additions, subtractions, substitutions, and improvements made by those skilled in the art based on the structure and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A terminal connection device for transformer testing, wherein the terminal has a stud, characterized in that: A cylinder with a diameter smaller than the stud is coaxially provided at the top of the stud, and a concave annular groove is provided on the cylinder; the connecting device mainly consists of a connecting pipe, a sleeve, and a compression spring. The lower end of the connecting pipe is provided with an outer conical surface that is larger at the bottom and smaller at the top, and multiple elastic claws for engaging the concave annular groove. The upper end of the connecting pipe is connected to the wire; the sleeve is fitted onto the connecting pipe, and the lower end of the sleeve is provided with an inner conical surface that mates with the outer conical surface. The compression spring is used to apply a downward thrust to the sleeve.

2. The transformer testing terminal connection device as described in claim 1, characterized in that: The upper part of the conduit and the sleeve are respectively provided with flanges, and the compression spring is installed axially between the flanges of the conduit and the sleeve.

3. The transformer testing terminal connection device as described in claim 2, characterized in that: A pair of handles are symmetrically arranged on the flanges of the conduit and sleeve.

4. The transformer testing terminal connection device as described in claim 3, characterized in that: An insulating rubber sleeve is installed on the handle.

5. The transformer testing terminal connection device as described in claim 1, characterized in that: The elastic claws are evenly distributed along the circumference of the connector, and the inner side of the elastic claws has a protrusion structure that matches the concave annular groove.

6. The transformer testing terminal connection device as described in claim 1, characterized in that: The taper of the outer and inner conical surfaces is 2-10°.

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